For something (patient ma-) to be straight, of a longitudinal object or line, as of a tree, one's legs, a boundary, the base of a stone wall.
For someone (agent muɴ-, -um-; s agent maN-) to straighten something (patient -on) crooked; to do something in a straight line, as to lay foundation stones, to run in a straight line, with the use of a suitable implement (inst i-, paN-).
Occurs as part of a verb chain, see sec. 7.19.