obmutescence noun.
[ɒbmju:'tɛs(ǝ)ns] Now
rare.
M17.[from Latin obmutescere, from ob- OB- + mutescere grow mute: see -ESCENCE.]The state or condition of becoming wilfully mute, speechless, or dumb; the action of obstinately remaining mute.
[TahlilGaran] English Dictionary ▲