marrer

Noun

 * 1)  One who mars or injures.

Etymology 1
Probably, with semantic shift "to get dizzy" > "to be bored" > "to be amused" (via antiphrasis).

Verb

 * 1)  to laugh; to be amused

Etymology 2
From the noun.

Verb

 * 1) to hoe dig using a hoe