widener

Noun

Any device used to widen something; especially a drill designed to produce a hole greater than its own diameter.

Japanese Meaning

何かを広げるための装置、特に自分の直径以上の穴を作るためのドリル

The carpenter used a widener to make room for the wider plank along the old doorway.

大工は古い戸口に幅の広い板を入れるために、隙間を広げる拡幅装置を使った。

Sense（1）

Any device used to widen something; especially a drill designed to produce a hole greater than its own diameter.

wideners

（ plural ）