This is the 7803rd most frequent Japanese word.
吸
"吸" means "to inhale," "to suck," or "to absorb."
In this sentence, '吸' is part of '深呼吸' (deep breath), highlighting its association with breathing and inhaling.
彼女は深呼吸をして心を落ち着けた。
She took a deep breath to calm herself down.
This demonstrates '吸' in '吸う', which means to smoke or inhale smoke, commonly used in the context of smoking habits.
彼はタバコを吸いません。
He doesn't smoke.
Here, '吸' is used in '吸い込む', demonstrating its usage to indicate inhalation or absorption.