FLATTENED
planate, flattened
(adjective) having been flattened
Source: WordNet® 3.1
Adjective
flattened (comparative more flattened, superlative most flattened)
Made flat by something.
Verb
flattened
simple past tense and past participle of flatten
The tree fell on the car and flattened it.
Source: Wiktionary
FLATTEN
Flat"ten, v. t. [imp. & p. p. Flattened; p. pr. & vb. n. Flattening.]
Etym: [From Flat, a.]
1. To reduce to an even surface or one approaching evenness; to make
flat; to level; to make plane.
2. To throw down; to bring to the ground; to prostrate; hence, to
depress; to deject; to dispirit.
3. To make vapid or insipid; to render stale.
4. (Mus.)
Definition: To lower the pitch of; to cause to sound less sharp; to let
fall from the pitch. To flatten a sail (Naut.), to set it more nearly
fore-and-aft of the vessel.
– Flattening oven, in glass making, a heated chamber in which split
glass cylinders are flattened for window glass.
Flat"ten, v. i.
Definition: To become or grow flat, even, depressed dull, vapid,
spiritless, or depressed below pitch.
Source: Webster’s Unabridged Dictionary 1913 Edition