Reverse Dictionary: SQUASH

ADJECTIVES
BUNGED UP squashed, creased, pushed together uncomfortably → 20C sl.
► MUSHED
having a squashed appearance → 1905

VERBS
QUAT to squash, to flatten, to extinguish → 1400 obs. exc. Eng. dial. 
SIT ON ► SIT UPON to squash, to snub → M19 sl.