from מָרָא in the sense of grossness, through the idea of domineering (compare מָרֵא); stall-fed; often (as noun) a beeve; fat (fed) beast (cattle, -ling).
or חֵלֶב; from an unused root meaning to be fat; fat, whether literally or figuratively; hence, the richest or choice part; [idiom] best, fat(-ness), [idiom] finest, grease, marrow.
from בָּקַר; beef cattle or an animal of the ox family of either gender (as used for plowing); collectively, a herd; beeve, bull ([phrase] -ock), [phrase] calf, [phrase] cow, great (cattle), [phrase] heifer, herd, kine, ox.
or צאוֹן; (Psalm 144:13), from an unused root meaning to migrate; a collective name for a flock (of sheep or goats); also figuratively (of men); (small) cattle, flock ([phrase] -s), lamb ([phrase] -s), sheep(-cote, -fold, -shearer, -herds).
TRV