Definitions

1. verb

to make (something) not tense or tight

“The yoga instructor told her to undistend her shoulders and breathe deeply.”

2. verb

to loosen (something) that is tight or tense

“She had to undistend the ropes on the sailboat before we could set sail.”

3. noun

a state of being not tense or tight

“After a long workout, she felt a sense of undistend in her muscles.”