Antonyms of verb unstrain

1 sense of unstrain

Sense 1
relax, unstrain, unlax, loosen up, unwind, make relaxed -- (cause to feel relaxed; "A hot bath always relaxes me")
       Antonym of strain (Sense 5)
      => tense, strain, tense up -- (cause to be tense and uneasy or nervous or anxious; "he got a phone call from his lawyer that tensed him up")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb unstrain

1 sense of unstrain

Sense 1
relax, unstrain, unlax, loosen up, unwind, make relaxed -- (cause to feel relaxed; "A hot bath always relaxes me")
       => affect -- (act physically on; have an effect upon; "the medicine affects my heart rate")