Noun

• S: (n) hang-up, hitch, rub, snag (an unforeseen obstacle)
• S: (n) rub, wipe (the act of rubbing or wiping) "he gave the hood a quick rub"
• direct hyponym / full hyponym
• direct hypernym / inherited hypernym / sister term
• derivationally related form

Verb

• S: (v) rub (move over something with pressure) "rub my hands"; "rub oil into her skin"
• S: (v) rub, fray, fret, chafe, scratch (cause friction) "my sweater scratches"
• S: (v) rub, scratch, itch (scrape or rub as if to relieve itching) "Don't scratch your insect bites!"
• direct hypernym / inherited hypernym / sister term
• S: (v) irritate (excite to an abnormal condition, or chafe or inflame) "Aspirin irritates my stomach"
• S: (v) worsen, aggravate, exacerbate, exasperate (make worse) "This drug aggravates the pain"
• S: (v) change, alter, modify (cause to change; make different; cause a transformation) "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"
• derivationally related form
• sentence frame