noun
Refers to a dirty, often smelly drainage ditch or gutter, typically found along roads or in urban areas. Carries a negative, unpleasant connotation.
道端のどぶに落ちてしまった。
I fell into the ditch by the roadside.
この辺りはどぶの臭いがひどい。
The smell from the drains is terrible around here.
noun
gap between cutting guides
Only with reading ドブ
Specialized term used in printing or paper cutting; refers to the gap between cutting guides. Usually written in katakana as ドブ.
印刷の工程で、ドブの幅を調整する。
In the printing process, adjust the width of the gap between cutting guides.
みぞ (溝) is a general term for a groove, ditch, or channel, and can be neutral or technical. どぶ specifically implies a dirty, smelly drainage ditch.
The origin is uncertain; possibly related to どろ (mud) or どぶん (splashing sound). The kanji 溝 is an assigned character, not reflecting the word's derivation.