Verb has 2 senses

• tense up(v = verb.body) tense - become tense, nervous, or uneasy; "He tensed up when he saw his opponent enter the room"

Sample sentences:
Somebody ----s
Somebody's (body part) ----s
Something ----s

• tense up(v = verb.body) strain, tense - cause to be tense and uneasy or nervous or anxious; "he got a phone call from his lawyer that tensed him up"



Sample sentences:
Somebody ----s something
Something ----s somebody