(1)障碍

(2)让步赛
在高尔夫球、保龄球、赛马等比赛中，为使强弱竞争者获胜机会相等，而由强者给予一定让步，或对其施以某种限制以使弱者在比赛开始时处于优势。

(3)(让步赛开始时对强者施加的)不利条件；障碍

• unlooked for mishap or untoward event
• unmarketable title
• unmarried
• unnatural offense
• unnatural will
• unnecessary exposure
• unnecessary exposure to danger
• unobjected to
• unoccupied
• unoccupied property
• unoffered lands
• UN official documents
• unofficial notes
• unofficial opinion
• unofficial primary
• unofficial publication
• unofficial report
• unopened way
• unorganized territory
• unpaid
• unpleaded
• unpossessed
• unprecedented
• unprofessional conduct
• unqualifiedly subject to the demands of shareholders