godan verb (-ku), transitive verb
To roughly handle something soft like paper or cloth, causing it to become wrinkled or crumpled.
彼は手紙を揉みしだいてポケットに押し込んだ。
He crumpled the letter and shoved it into his pocket.
godan verb (-ku), transitive verb
rub thoroughly; massage roughly; grope
To rub or massage something vigorously, often with a sexual connotation. Can imply rough or persistent handling.
マッサージ師が肩を揉みしだくようにほぐしてくれた。
The massage therapist worked on my shoulders, kneading them thoroughly.
痴漢に体を揉みしだかれた。
I was groped by a molester.