tool – инструмент, орудие, см. toil (1), till (2)

tool (n.) (староанглийское «tol» - инструмент, орудие); из протогерманского *to (w) lam – орудие, инструмент
Old English tol "instrument, implement used by a craftsman or laborer, weapon," from Proto-Germanic *to(w)lam "implement" (source also of Old Norse tol), from a verb stem represented by Old English tawian "prepare" (see taw). The ending is the instrumental suffix -el (1).

1675:
TOOL (tool, из tylean, Sax., tuyle, Belg. – работать) – инструмент
Дело, делаю – ДЛ – DL - TL