(1):
(v. t.) To tinge with sallowness.
(2):
(superl.) Having a yellowish color; of a pale, sickly color, tinged with yellow; as, a sallow skin.
(3):
(n.) The willow; willow twigs.
(4):
(n.) A name given to certain species of willow, especially those which do not have flexible shoots, as Salix caprea, S. cinerea, etc.