insertion; plugging in
General act of inserting something into a slot, socket, or opening; also used for inserting supplementary pages or materials into a publication.
Please check the power plug connection.
There was an advertising insert in the newspaper.
Refers to the electrical plug itself or the socket/outlet; context usually makes the distinction clear.
This plug doesn't fit the outlet.
Sudden, gripping pain, often in the abdomen or side; commonly used for a side stitch during exercise or intestinal cramps.
While running, I got a stitch in my side.
Suddenly a sharp pain hit me and I couldn't move.
Standard kanji spelling; used in news and common writing.
Irregular okurigana usage; may appear in technical or compact contexts.
Variant spelling with slightly reduced okurigana; less common but still seen.
Noun form of the verb 差し込む (to insert, to plug in, to have a sudden pain). The pain sense likely derives from the sensation of something 'stabbing' or 'inserting' itself sharply.