n. 白痴, 极蠢之人

[医] 白痴者, 痴子

[ noun ]
a person of subnormal intelligence
<noun.person>

Idiot \Id"i*ot\ ([i^]d"[i^]*[o^]t), n. [F. idiot, L. idiota an
uneducated, ignorant, ill-informed person, Gr. 'idiw`ths,
also and orig., a private person, not holding public office,
fr. 'i`dios proper, peculiar. See {Idiom}.]
1. A man in private station, as distinguished from one
holding a public office. [Obs.]

St. Austin affirmed that the plain places of
Scripture are sufficient to all laics, and all
idiots or private persons. --Jer. Taylor.

2. An unlearned, ignorant, or simple person, as distinguished
from the educated; an ignoramus. [Obs.]

Christ was received of idiots, of the vulgar people,
and of the simpler sort, while he was rejected,
despised, and persecuted even to death by the high
priests, lawyers, scribes, doctors, and rabbis. --C.
Blount.

3. A human being destitute of the ordinary intellectual
powers, whether congenital, developmental, or accidental;
commonly, a person without understanding from birth; a
natural fool. In a former classification of mentally
retarded people, idiot designated a person whose adult
level of intelligence was equivalent to that of a
three-year old or younger; this corresponded with an I.Q.
level of approximately 25 or less.
[1913 Webster +PJC]

Life . . . is a tale
Told by an idiot, full of sound and fury,
Signifying nothing. --Shak.

4. A fool; a simpleton; -- a term of reproach.

Weenest thou make an idiot of our dame? --Chaucer.