אָח ʼâch (H251)

a brother (used in the widest sense of literal relationship and metaphorical affinity or resemblance (like father))

1) brother 1a) brother of same parents 1b) half-brother (same father) 1c) relative, kinship, same tribe 1d) each to the other (reciprocal relationship) 1e) (fig.) of resemblance

a primitive word;