Help translating a Chinese character
The Chinese character is 愣 (lèng). Usually characters with the 心-radical (on the left) are related to emotions.
From Oxford Dictionaries:
adjective

distracted
blank

verb

stare blankly
look distracted

Common collocations include 愣住 (～住 roughly means 'to a halt') and 發[发]愣 (發～ suggests initiation; see 發瘋 'to go mad'). Sometimes 愣乎乎, but this is more colloquial than the rest. A synonym of 愣 is 呆; you may say 發呆 as well, occasionally 呆住.
Examples:

他原地愣住了 'He stood still, flabbergasted'
別老站那兒發愣了 'Don't just stand there staring blankly (at nothing)'