ULTRA- (L.), beyond, as _ultra_marine. The French form _outre_ appears in
_out_rage and in _utter_ance. [From _ulter_ (stem of _ulterior_), _ul-_
being from root of L. _ille_.]
UM-, in _um_pire. See Non-.
UN- (A.S.), negative prefix, not, as _un_happy, _un_truth, _un_couth. [Cog.
with Gr. _an-_ and L. _in_- (negative).]
UN- (A.S.), verbal prefix, signifying the reversal of an action, as
_un_lock, _un_bind, _un_do, _un_wind. [A.S. _on-_, _un-_; cf. Dut. _ont-_,
Ger. _ent-_, Goth. _and-_. See A- (A.S.) (2).]