arithmetically
In a way characterized by addition (of increments) rather than multiplication (by factors) or exponentiation (by exponents): by an arithmetic progression.
In terms of arithmetic.

armlessly
In an armless way; without arms.

armorially
In terms of or by means of armorial bearings.

aromatically
In an aromatic manner.

aroost
Of a bird, roosting.

arousingly
In an arousing manner.

arow
In a row, line, or rank; successively.

arpeggiando
A passage to be played in the style of a harp.

arpeggiandos
plural of arpeggiando

arrantly
In an arrant manner; utterly, thoroughly, outright.

arraswise
exhibiting the top and two sides, the corner being in front (said of a rectangular form).

arrear
Towards the rear, backwards.
Behind time; overdue.

arrestingly
In a way or to an extent that is arresting; so as to catch the attention suddenly.

arrestively
In an arrestive manner.

arrhenotokously
By means of arrhenotoky

arrhythmically
In an arrhythmic manner; without a fixed rhythm

arrishes
plural of arrish

arrisways
Alternative form of arriswise.

arriswise
Diagonally, tiles so laid relative to walls or walkway.
According to a method of sawing lengthwise a timber beam of rectangular cross section, diagonally from corner to corner, to form two beams of triangular cross section.

arrogantly
In an arrogant manner; with undue pride or self-importance.

arrowily
In an arrowy manner; like an arrow.

arseling
Backwards.

arselings
Alternative form of arseling.

arselong
Backwards; on one's arse.

arsewards
Commonwealth form of asswards.

arseways
Anally.
Badly or wrongly; in the wrong position.

artefactitiously
Alternative form of artifactitiously.

artefactually
Alternative form of artifactually.

arterially
In terms of or by means of the arteries.

arteriographically
By means of, or in terms of, arteriography.

arterwards
Pronunciation spelling of afterwards.

artfully
In an artful manner.

arthritically
In an arthritic fashion: in a way that is characteristic of a person with arthritis

arthroscopically
By means of arthroscopy.

arthrously
In an arthrous manner; with an accompanying article.

articularly
In an articular manner.
In an articular manner.

articulately
In an articulate manner.

articulatively
In an articulative manner.

articulatorily
In terms of, or by means of, articulation.

artifactitiously
In an artifactitious manner.

artifactually
With reference to artifacts
Apparently but not truly, with the appearance being due to artifacts; spuriously.

artificially
In an artificial manner.
By or because of human effort.

artily
In an arty fashion.

artisanally
In an artisanal manner.
With regard to, or by artisans.

artistically
In an artistic manner.
Regarding arts

artlessly
In an artless manner.

artly
With art or skill; artfully.

artsily
In an artsy way.

artwise
In terms of art.

asaic
Alternative form of ASAIC.

asap
Alternative letter-case form of ASAP.

ascaunt
Obsolete form of askance.

ascendantly
In an ascendant manner.

ascendingly
In an ascending manner.

asceptically
Misspelling of aseptically.

ascertainably
In a way that can be ascertained.

ascertainedly
In a way that is ascertained.

ascetically
In an ascetic manner.

asciibetically
Alternative letter-case form of ASCIIbetically.

ascriptively
In an ascriptive manner.

asdet
Acronym of after sudden death extra time.

asearch
Searching.

aseasonally
In an aseasonal manner.

aseismically
In an aseismic manner.

asemantically
In an asemantic way.

aseptically
In an aseptic manner.

asexually
In an asexual manner; without having sex.

ashamedly
with shame

ashamingly
In an ashaming manner.

ashenly
In an ashen way.

ashily
In an ashy way.

aship
On or onto a ship.

ashipboard
on shipboard

ashore
On the land as opposed to onboard.
On, or towards the shore.

asininely
In an asinine manner; very foolishly.

askile
Askant.

askingly
In an asking manner; so as to ask.

aslantwise
aslant; in a slanting orientation

aslug
sluggishly

asocially
In an asocial way.

aspecifically
In an aspecific manner

aspectually
concerning aspect

asperously
In an asperous manner.

aspersively
In an aspersive manner.

aspherically
In an aspheric manner

asphyxiatingly
stiflingly

aspirationally
In an aspirational manner.

aspiringly
In an aspiring manner.

assai
A tempo direction equivalent to "very".

assaultively
In an assaultive manner.

assback
The back of a donkey.

assbacks
plural of assback

assentatorily
In an assentatory manner.

assentingly
in an assenting manner

assertedly
According to an assertion.

assertionally
In a way that uses or relates to assertion.

assertively
In an assertive manner.

assertorially
In an assertorial manner.

assertorically
In an assertoric fashion.

assertorily
In an assertory manner

assessably
In an assessable manner.

assessingly
So as to assess.

asseveratingly
in an asseverating manner

asseveratively
In an asseverative manner.

assholishly
In an assholish manner; rudely.

assishly
In an assish manner.

assistantly
So as to assist or aid.

assistingly
So as to help or assist.

associationally
In an associational manner.

associatively
In an associative way.

assonantly
In an assonant manner.

assoon
Archaic spelling of as soon (as)....
As soon (as might be); immediately; forthwith.

assortatively
In an assortative way.

assortedly
In an assorted manner.

assuagingly
So as to assuage.

assuasively
In a soothing manner.

assumably
presumably; as one may assume

assumedly
In an assumed manner; presumably.

assumingly
In an assuming manner.

assumptively
In an assumptive manner.

assuredly
In an assured manner; confidently.
For sure; certainly.

assuringly
In an assuring manner.

assward
Ass first; backward.

asswards
Ass first; backwards.

astarboard
Over to the starboard side.

astare
Staring; amazed.

astatically
In an astatic manner.

astay
Of an anchor, such that in heaving it, an acute angle is formed between the cable and the surface of the water.

asteroseismologically
With regard to asteroseismology

asthmatically
In an asthmatic manner.

astigmatically
In an astigmatic manner; through or in relation to astigmatism.

astonishedly
In an astonished manner.

astonishingly
In an astonishing manner; so as to surprise or astonish.
Very; remarkably used as an intensifier.

astoop
In a stooping or inclined position.

astoundedly
In an astounded manner.

astoundingly
In an astounding manner; so as to astound, surprise, or amaze.

astraddle
In a straddling position; astride.

astrally
In an astral manner or context.

astray
Away from the proper path; in a wrong or unknown direction.
Away from what is right and good; into error or evil.

astretch
Stretched out, extended.
Straining to perceive, alert (of sensory organs or mental faculties).

astride
With one’s legs on either side.

astrobiologically
By means of, or in reference to astrobiology

astrochemically
in an astrochemical manner.

astrochronologically
By means of astrochronology.

astrocytically
In an astrocytic manner

astrodynamically
In an astrodynamic way.

astrologically
In an astrological manner.
With regard to astrology.

astrometeorologically
In terms of astrometeorology.

astrometrically
In an astrometric manner; by means of astrometry.

astronautically
In an astronautic way.

astronomically
Of or relating to astronomy.
In the extreme, very (typically very large).

astrophysically
With regard to astrophysics

astroseismically
In a astroseismic manner

astrut
Sticking out, puffed out, or in a strutting manner.

astuciously
astutely

astutely
In an astute manner.

asudden
of a sudden; suddenly

asunder
Into separate parts or pieces.

asundre
Obsolete spelling of asunder.

aswagger
Swaggering, with a proud or boastful swaying gait.

asweep
Sweeping, making a sweeping motion.

aswel
Obsolete spelling of as well.

aswell
Archaic spelling of as well.
Misspelling of as well.

aswing
In a state of swinging.

aswirl
Swirling; in a swirl; full of or surrounded by something swirling.