How do you say ‘auto-antonym’ in Esperanto?

Question

Neither Benson, nor Wells, nor Vikivortaro, nor ReVo, nor Sonja has an entry for ‘auto-antonym’.

Perhaps it should be ‘aŭtoantonimo’, following the pattern of ‘aŭtodidakto’ / ‘aŭtokrato’.

Answer 1

Aŭto is not a productive prefix in Esperanto - unless we're talking about automobiles. You'd use mem- in this situation.

mem-antonimo

Answer 2

Bona vorto povus esti sin-malnomiga.