こする・擦る・錯るkosuru[2]nakadaka (mid-high)

1. godan verb, transitive verbto rub; to scrub; to scrape
   石せっけんを付つけてごしごしこすれば汚よごれが落おちます。↗

   Rub briskly with soap, and the stain will soon wash off.
2. godan verb, transitive verbto repeatedly reuse (a joke, a topic of conversation, etc.); to milk; to keep getting mileage out of
3. godan verb, transitive verb, video gamesto mash (a button); to spam (a move)esp. in fighting games

• SynonymさするNeutralRead 「する」, this homograph covers rubbing, striking a match as in 「マッチを擦る」, filing, and squandering money; 「こする」 stresses forceful back-and-forth rubbing.
• Synonym摩擦まさつNeutralA noun for physical friction or rubbing, and for discord between people, as in 「貿易摩擦」; leans toward written, formal prose.
• Related磨くみがくNeutralTo polish, shine or brush something clean, as in 「歯を磨く」; also to hone or refine a skill through effort.
• RelatedなすりつけるNeutralTo rub or smear something onto a surface, and by extension to pin blame or responsibility on someone, as in 「責任をなすりつける」.
• Related擦れるすれるNeutralIntransitive: surfaces rub and wear against something, as in 「袖が擦れる」; also used for a person becoming sly or worldly.
• Related擦りむくすりむくNeutralTo scrape or graze the skin, as in 「膝を擦りむく」; the focus is on the resulting minor injury rather than the rubbing itself.
• Related擦れ合うすれあうNeutralIntransitive: two things rub against or brush past each other, as in 「袖が擦れ合う」; also used for people quarrelling or clashing.

Use 「擦る（こする）」 for forceful back-and-forth rubbing, as in 「目をこする」. For gentle, soothing strokes pick 「さする」, for polishing or brushing 「磨く」, for grazed skin 「擦りむく」, and for striking a match 「擦る（する）」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 物ものを他ほかの物ものを押し当おしあて強つよく動うごかす。何度なんどでも続つづけて動うごかす。する。摩擦まさつする。
2. 他ほかの事ことにかこつけて遠とおまわしに嫌味いやみや皮肉ひにくをいう。あてこする。