off-balance

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˌoff-ˈbalance, off balance adjective [not before noun]  1  BALANCEin an unsteady position and likely to fall 不平衡的，不稳定的throw/knock/push etc somebody off-balance The sudden movement of the ship knocked them both off balance. 船突然移动，使得他俩都失去了平衡。2  catch/throw somebody off-balance to surprise or shock someone because they are not prepared for something that happens 使某人猝不及防 I was thrown off-balance by some of the more difficult questions I was asked. 我被问到几个较难的问题，一时措手不及。

Examples from the Corpus

off-balance• Unfortunately, Joan catches Victor slightly off-balance and he falls against a wall, bruising his arm slightly.• He dragged her backwards and off-balance, and then kept her moving so that she couldn't recover.• Tucker made a spectacular off-balance catch to end the game.• I was off-balance, falling forward, lurching with giant strides, certain that the next step would end in a nosedive.• Simon followed his own miss with an off-balance floater to tie the score at 75-75.• Their lead swelled to 46-41 when Jamar Curry made an off-balance jumper with 17: 06 left.• She was off-balance - nothing she could do to prevent herself from turning towards him as his grip pulled her in.• But Abdur-Rahim missed an off-balance shot and Jelani McCoy grabbed the loose ball.

ˌoff-ˈbalance adjectiveChineseSyllable  

position and likely unsteady an in to Corpus

off-balance
ˌoff-ˈbalance , off balance adjective [not before noun]
1. in an unsteady position and likely to fall
    throw/knock/push etc somebody off-balance
    The sudden movement of the ship knocked them both off balance.
2. catch/throw somebody off-balance to surprise or shock someone because they are not prepared for something that happens:
    I was thrown off-balance by some of the more difficult questions I was asked.