This sign can mean such things as "inhale" and "breathe in."
INHALE:
Another way to express the concept of "inhale" is by doing the first
half of the sign BREATHE.
This shows the expansion of the lungs:
INHALE ("breathe" version)
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American Sign Language (ASL) online at American Sign Language University ™
ASL resources by Lifeprint.com © Dr. William Vicars