felo de se
Concise Oxford English Dictionary © 2008 Oxford University Press:
felo de se /ˌfiːləʊ deɪ ˈseɪ, ˌfɛ-/
▶noun (pl. felos de se) suicide.
– origin from Anglo-Latin, lit. ‘felon of himself’ (suicide was formerly a criminal act in the UK).
'felo de se' also found in these Oxford entries:

