Plough

The triliteral root thā wāw rā (ث و ر) occurs in the Quran 5 times.

To plough up clouds

(35:9) God is the One who sends the winds so that they plough up (Arab. فَتُثِيرُ, fatuthīru) clouds, then We drive them to a town that is dead, and We revive with them the land after it had died. Such is the reincarnation.