tense up

tense up
An intransitive verb is one that does not require a direct object (e.g. The man sneezed.).
intransitive verb
1. (general)
a. ponerse tenso(a)
tense up
verb:intransitive:plus_adverb
transitive verb
Tense up the muscles in both of your legs
Collins Complete Spanish Electronic Dictionary © HarperCollins Publishers 2011
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