sarsá– (transitive verb), imperfective sarsáram: to sharpen, hone (esp. a knife or weapon).
allándut tambám nget racát rácarav mattár lecá sarsá‘ ma-ndarendecut
hero.DEF hear that enemy come.ITER he.ILL so.that sharpen.PERF.TRANS his-sword.BEN.DEF
“the hero heard the enemy approaching, and so sharpened his sword”
sarsáram is one of the few transitive verbs that take a direct object in the benefactive case – implying, of course, that the sharpening that is done to the weapon is beneficial to its utility.