спятить

Russian

Perhaps from с- (s-) +‎ пя́тить (pjátitʹ)

спя́тить • (spjátitʹ) pf

(colloquial) to go balmy, to go off one's rocker
Synonyms: сойти́ с ума́ (sojtí s umá), свихну́ться (svixnútʹsja)

ты спя́тил! ― ty spjátil! ― you must be mad/crazy!; you're out of your mind!

Conjugation of спя́тить (class 4a perfective intransitive)

Note: For declension of participles, see their entries. Adverbial participles are indeclinable.
perfective aspect
infinitive	спя́тить spjátitʹ
participles	present tense	past tense
active	—	спя́тивший spjátivšij
passive	—	—
adverbial	—	спя́тив spjátiv, спя́тивши spjátivši
	present tense	future tense
1st singular (я)	—	спя́чу spjáču
2nd singular (ты)	—	спя́тишь spjátišʹ
3rd singular (он/она́/оно́)	—	спя́тит spjátit
1st plural (мы)	—	спя́тим spjátim
2nd plural (вы)	—	спя́тите spjátite
3rd plural (они́)	—	спя́тят spjátjat
imperative	singular	plural
	спя́ть spjátʹ	спя́тьте spjátʹte
past tense	singular	plural (мы/вы/они́)
masculine (я/ты/он)	спя́тил spjátil	спя́тили spjátili
feminine (я/ты/она́)	спя́тила spjátila
neuter (оно́)	спя́тило spjátilo