The present paper identifies new attestations for, and revises the meanings of, some rare words and expressions that appear mainly in Mari letters: baziʔitum '(a kind of) monkey'; bêšum 'to explain, make clear'; ḫarāqum 'to breach'; ina šārat waṣûm 'to escape by a hair's breadth'; kīsum 'purse'; pāḫātum 'responsibility'; rabbum 'chief'; sagûm 'to wander'; sakānum 'to settle'; tabākum 'to throw out'; tarākum 'to hold aloft'.