molest v.

"massive structure used as a breakwater," 1540s, from French môle "breakwater" (16c.), ultimately from Latin moles "mass, massive structure, barrier," perhaps from PIE root *mō- "to exert oneself" (source also of Greek molos "effort," molis "hardly, scarcely;" German mühen "to tire," müde "weary, tired;" Russian majat' "to fatigue, exhaust," maja "hard work").

c. 1400, molestacioun, "action of annoying or vexing," from Old French molestacion "vexation, harassing," and directly from Medieval Latin molestationem (nominative molestatio), noun of action from past participle stem of molestare (see molest). In Scottish law it meant "the harassing of a person in his possession or occupation of lands;" in English common law it came to mean "injury inflicted upon another."