1. (

• hang-up ,
• hitch ,
• rub ,
• snag

) an unforeseen obstacle ;

2. (

• rub ,
• wipe

) the act of rubbing or wiping; "he gave the hood a quick rub" ;

1. (

• rub

) move over something with pressure; "rub my hands"; "rub oil into her skin" ;

2. (

• rub ,
• fray ,
• fret ,
• chafe ,
• scratch ,

) cause friction; "my sweater scratches" ;

3. (

• rub ,
• scratch ,
• itch ,

) scrape or rub as if to relieve itching; "Don't scratch your insect bites!" ;