TOUCH (OR CHIEFLY N. AMER. KNOCK ON) WOOD
Meaning of TOUCH (OR CHIEFLY N. AMER. KNOCK ON) WOOD in English
touch ( or chiefly N. Amer. knock on) wood
touch something wooden to ward off bad luck.
→ wood
Concise Oxford English vocab.
Сжатый оксфордский словарь английского языка.
2004