A verb stem bel- attested only in the explanations for the agental-formation -bêl in the name Azrubêl “Friend of the Sea, Sea-lover” (SD/305, PM/373). The form bel- violates Adûnaic phonetic rules given in Lowdham’s Report, which state that [ē] can only be a long vowel in Adûnaic (SD/423). See the discussion of its root form ✶Ad. √BEL for possible explanations. The Classical Adûnaic verb form might be bêl-, while bel- may instead be its most primitive (early Elvish?) form.
This verb seems to have a sense similar to that of zîr- “to love, desire”. Perhap it is distinct from zîr- in that it has more to do with friendship than desire, so that the verb means “to befriend” or “to love (as a friend)”.