1. (noun) something immaterial that stands in the way and must be circumvented or surmounted

• obstruction

1. (noun) something immaterial that stands in the way and must be circumvented or surmounted

• balk
• baulk
• check
• deterrent
• handicap
• hinderance
• hindrance
• impediment

2. (noun) an obstruction that stands in the way (and must be removed or surmounted or circumvented)

• impediment
• impedimenta
• obstructer
• obstruction
• obstructor

1. (noun) something immaterial that stands in the way and must be circumvented or surmounted

• barrier
• roadblock
• hang-up
• hitch
• rub
• snag
• hurdle
• stymie
• stymy

2. (noun) an obstruction that stands in the way (and must be removed or surmounted or circumvented)

• hazard
• stumbling block
• water jump