['witl]
[古]知道妻子不贞而予以容忍的丈夫

[ noun ]
an archaic term for a cuckold who knows about his wife's infidelity but tolerates it
<noun.person>

Wittol \Wit"tol\, n. [Said to be for white tail, and so called
in allusion to its white tail; but cf. witwal.]
1. (Zo["o]l.) The wheatear. [Prov. Eng.]

2. A man who knows his wife's infidelity and submits to it; a
tame cuckold; -- so called because the cuckoo lays its
eggs in the wittol's nest. [Obs.] --Shak.