| var. of ex- 1 (by assimilation) before f: efficient. |
| a prefix meaning “out of,” “from,” and hence “utterly,” “thoroughly,” and sometimes imparting a privative or negative force or indicating a former title, status, etc.; freely used as an English formative: exstipulate; exterritorial; ex-president (former president); ex-member; ex-wife. |
ex- pref.
Outside; out of; away from: excementosis.