i Register
In some senses, seld is marked as obsolete, archaic. Watch for register when choosing this word.
noun
A seat, throne.
A shop (in Medieval Latin records selda or silda (cf. Latin sella (“seat, chair”)); also in Anglo-Norman form seude). Also, a stand for spectators.
adj
Rare, uncommon.
Unusual, unwonted.
adv
Seldom.
knowing how far such an amitie is from the common use, and how seld seene and rarely found, I looke not to finde a competent judge.