(Chinese astronomy) the Heart constellation, one of the Twenty-Eight Mansions / a male or female given name / a surname

expresses heartfelt feeling

a heart, mind, core / a spirit, vitality / inner strength, marrow / 心, 芯: the core (for example, of a fruit) / 心, 芯: a wick / (Buddhism) citta: the ego or spirit / (Buddhism) Short for 心王 (shinnō):

Short for 心臓 (shinzō): heart as an organ in the body / Short for 心頭 (shintō): heart, mind, spirit / Short for 中心 (chūshin): center, middle

(mechanics) aerodynamics

(exercise) wall squat / A group activity where a ring of people attempt to maintain the position of "sitting" on the lap of the person behind them.

air gun

(colloquial) unable to pick up on social cues or the situation; lacking social awareness or situational awareness

compressed air

emotional atmosphere