tense up

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Verb
1. become tense or tenser; "He tensed up when he saw his opponent enter the room"
(synonym) tense
(hypernym) change state, turn
2. make tense and uneasy or nervous or anxious;
(synonym) tense, strain
(hypernym) affect
(hyponym) crick
(cause) tense

phrv. ปั่นป่วน, ตึงเครียด, วิตก (syn. screw up)