perdurably
in a perdurable manner

perduringly
enduringly; lastingly

peremptorally
Misspelling of peremptorily.
Misspelling of preemptorily.
Misconstruction of preemptively.

peremptorily
In a peremptory manner; in a commanding tone, brooking no delay.

perennially
Year after year (literally: each year).
Constantly; with frequent recurrence.

perfectionistically
In a perfectionistic way.

perfectively
In a perfective manner or context

perfectly
With perfection.
Wholly, completely, totally.

perfervidly
In a perfervid manner.

perfidiously
In a perfidious manner.

perfightlie
Obsolete form of perfectly.

perfightly
Obsolete form of perfectly.

perfoliately
In a perfoliate manner.

perforately
In a perforate manner.

perforce
By constraint of circumstances; of necessity; as a matter of course.
By force.

perforcedly
Synonym of perforce (“necessarily; by constraint of circumstances”).

perforcely
Synonym of perforce (“necessarily; by constraint of circumstances”).

performantly
In a performant way.

performatively
In a performative manner.

perfunctorily
In a perfunctory manner, without interest or concern for quality.

perfunctoriously
Synonym of perfunctorily.

perh
Abbreviation of perhaps.

perhap
Obsolete form of perhaps.

perhappenstance
Perhaps.

perhaps
Possibly.
By chance.

perhapses
plural of perhaps

periadventitially
In a periadventitial manner

perianally
Around the anus.

periaortically
In a periaortic manner

periapically
In a periapical manner

periaqueductally
Around the aqueduct.

periarterially
In a periarterial manner

periarticularly
In a periarticular manner

periaxially
Around an axis.

peribronchially
In a peribronchial manner

pericardially
In a pericardial way.

pericellularly
Surrounding a cell

pericentrally
Around the centre

pericentromerically
In a pericentromeric manner

perichondrally
In a perichondral manner

perichordally
In a perichordal manner

periclinally
In a periclinal manner

pericoitally
In a pericoital manner; around the time of sexual intercourse.

periconceptionally
Around the time of conception.

periconceptually
Around the time of conception.

pericontusionally
In a pericontusional manner

peridomestically
In a peridomestic manner

perigenitally
In a perigenital manner

periglacially
Around the edge of a glacier.

perigynously
In a perigynous manner.

perilesionally
In a perilesional manner

perilingually
Around the time that a person acquires language.

perilously
In a perilous manner.

periluminally
Around the lumen.

perilymphatically
In a perilymphatic manner

perimenopausally
Around the time of menopause.

perimenstrually
Around the time of menstruation.

perimetrically
in a perimetrical manner

perimortally
In a perimortal manner

perinatally
Around the time of birth.

perineally
In a perineal fashion.

perineurally
Near a nerve or nerves.

perinuclearly
Around a nucleus

periocularly
Around the eye.

periodically
In a manner that is regular or periodic.
intermittently or recurrently.

periodontally
In a periodontal way.

perioperatively
In a perioperative manner.

periorally
In a perioral manner

periorbitally
In a periorbital manner

periosteally
In the periosteum.

periostially
Misspelling of periosteally.

periovulatorily
Around the time of ovulation.

peripartally
At around the time of childbirth.

peripatetically
In a peripatetic manner.

peripherad
Towards the periphery.

peripherally
In a peripheral manner.
At or towards a periphery.

peripherically
Alternative form of peripherally.

periphrastically
With circumlocution or periphrasis.

periplasmatically
In a periplasmatic manner

periplasmically
In a periplasmic manner

periportally
Around the portal vein.

periprandially
In a periprandial manner

periprocedurally
In a periprocedural manner: shortly before, during, and/or shortly after a procedure (but without further specificity).
In a periprocedural manner: shortly before, during, and/or shortly after a procedure (but without further specificity).

peripubertally
In a peripubertal manner

perirectally
Around the rectum.

perisaccadically
In a perisaccadic manner

periscopically
Using a periscope.
With a similar movement to that of a periscope.

perishably
In a perishable manner.

perishingly
extremely

perisinusoidally
In the vicinity of the sinusoids.

perisomatically
In a perisomatic manner

peristaltically
In terms of, or by means of, peristalsis.

perisynaptically
In a perisynaptic manner

peritectically
In a peritectic manner

peritectoidally
By a peritectoid reaction.

peritectoidically
Alternative form of peritectoidally.

peritherapeutically
In a peritherapeutic manner

peritidally
In or relating to the peritidal region.

peritoneally
By way of the peritoneum

peritrichously
In a peritrichous manner.

peritumorally
Around a tumor

peritumourally
In a peritumoural manner

periureterally
Around the ureter.

periurethrally
Around the urethra.

perivascularly
In a perivascular manner

periventricularly
Around the ventricle.

perjuredly
Having committed perjury.

perjuriously
In a perjurious manner.

perkily
In a perky manner.

permanently
In a permanent manner; lastingly.
Forever.

permeably
In a permeable manner.

permissibly
In a permissible manner.

permissively
In a permissive manner.

permittedly
In a permitted or permissive manner

permutably
Such that it can be permuted.

permutationally
In a permutational manner.
With regard to permutation.

permutatively
In a permutative manner.

permyriad
One out of every ten thousand (myriad); one percent of one percent.

perniciously
In a pernicious manner.

pernicketily
British English standard form of persnicketily.

peroneally
In a peroneal manner

peroperatively
In a peroperative manner

perorally
By way of the mouth.

peroxisomally
By means of the peroxisome

perpendicularly
In a perpendicular manner.

perpetually
Seeming to never end; endlessly; constantly.

perpetuously
Synonym of perpetually (“everlastingly, in perpetuity, for ever”).

perplexedly
In a confused or puzzled manner.

perplexingly
In a way or to an extent that is perplexing.

perplexly
perplexedly

perradially
In a perradial manner.

persay
Misspelling of per se.

persecutingly
So as to persecute.

persecutorily
In a persecutory manner.

perseverantly
With perseverance; persistently.

perseveratively
In a perseverative manner

perseveringly
In a persevering manner; with perseverance.

persistently
In a persistent manner.

persistingly
With persistence.

persistively
persistently

persnicketily
With a great attention to details and precision; in a persnickety fashion.

personably
In a personable manner.

personalitywise
In terms of personality.

personally
In a personal manner.
In person.
Concerning oneself.
As a person.

personately
In a personate manner.

personologically
In terms of personology.

perspectively
By means of perspective; in perspective.

perspectivistically
In a perspectivistic manner.

perspicaciously
With the power of seeing or understanding clearly; quick-sightedly; with sharp of sight.
With acute discernment; keenly; with mental perception.

perspicuously
With clarity and lucidity.

perspiringly
While perspiring; with perspiration or sweat.

persuadably
In such a way that one may be persuaded.

persuadingly
persuasively

persuasibly
Synonym of persuadably.

persuasively
In a manner intended to convince or persuade.

perthitically
In the form of perthite.

perticularly
Obsolete form of particularly.

pertinaceously
Alternative form of pertinaciously.

pertinaciously
In a stubbornly resolute manner; tenaciously holding one's course of action or opinion.

pertinately
pertinaciously

pertineer
Almost; nearly.

pertinently
In a pertinent manner; relevantly.

pertly
In a manner that is lively or high-spirited

perturbatively
In a perturbative manner
With regard to perturbation

perturbedly
In a perturbed manner.

perturbingly
In a manner that perturbs.

pervadingly
In a manner that pervades.