present participle of gudgeon

Any four-stroke cycle, such as the Otto cycle, for an internal combustion engine.

At an automatic half-barrier level crossing, a lifting barrier that does not block the whole road when in the horizontal position, placed on the left side in the UK according to driving on the left...

Situated under one's foot or feet. / In the way; placed so as to obstruct or hinder. / Downtrodden; abject.