varná- (transitive verb), imperfective varnávam: to wake up (someone).
ca layúcav yat már varná-m cal
I sleep.IMPERF then he/she wake.up.PERF-TRANS I.ACC
“I was sleeping when he/she woke me up”
The verb varnávam is underlyingly transitive, but may also be used in the middle voice in an intransitive sense (as in “I woke up”).