Meaning

noun a soft oily clay used as a pigment (especially a reddish brown pigment)

noun the main stem of a tree; usually covered with bark; the bole is usually the part that is commercially useful for lumber

noun a Chadic language spoken in northern Nigeria and closely related to Hausa

originFrom earlier Bolle, ultimately from either the dative singular bolde or dative plural boldum of bold (“house”); the latter is perhaps suggested by its attestation in the Domesday Book as Medieval Latin Bolun.

Etymology from Wiktionary, CC BY-SA 3.0