Word: undersill
Part of speech: Adjective
Syllables: un
der
sill
Definition: Beneath a sill.
Morphemes:
Affix: under-
Language: en
PoS: Prefix
Meaning: Under (in any sense): insufficient, insufficiently, below what is correct; subordinate to; beneath or behind.
Affix: sill
Language: en
PoS: Noun
Meaning: threshold; horizontal structural member of a building near ground level on a foundation or pilings, or lying on the ground, and bearing the upright portion of a frame. Wikipedia:Sill Plate