knock on wood

US /nɑk ɑn wʊd/
UK /nɑk ɑn wʊd/
"knock on wood" picture
1.

木に触れる, 幸運を祈る

said to ward off bad luck, often while knocking on a wooden object

:
I haven't had a cold all winter, knock on wood.
この冬は風邪をひいていません、木に触れて
Our business has been doing great this year, knock on wood.
今年は事業が好調です、木に触れて