unable adj.
VERBS appear, be, feel, look, prove, seem | become | remain | find yourself, leave sb, make sb She found herself unable to meet his gaze. The accident left him unable to walk. | deem sth The road was deemed unable to cope with increased traffic.
ADV. completely, quite, totally, utterly, wholly | increasingly | almost, nearly, virtually | apparently, seemingly He went on, apparently unable to stop. | genuinely | generally | temporarily Clare nodded, temporarily unable to speak. | still | constitutionally, physically He seemed constitutionally unable not to give his opinion on anything and everything.
PHRASES unwilling or unable He remained silent, unwilling or unable to say what was in his mind.
You can also check other dicts: unable (English, 中文解释 ), wordnet sense, Collins Definition