to flatten, level (the ground, etc.) / to average, make things equal

partner, sidekick (someone who is associated with another in a common activity or interest)

(archaic) to be wild, to become wild, to be harsh or excessively strong / (archaic) to be neglected, to fall into ruin, to be uncivilized

(chiefly in the negative) to fall into the viscera: to be acceptable / understandable