What? The captain abandoned his sinking ship before the passengers had been safely evacuated? What a craven act!
crepare (to crack, creak) (Latin)
craven, pusillanimous, timorous
one who keeps craving but doesn't do anything craven - relate with cave + in. You hide in cave if your are coward (in a jungle) craven -- is the opposite of 'brave'. Craven sounds like Cita + RAVana => Ravana was a coward man!!! he proved it by taking away Cita/Sita in absence of Ram.