na-adjective, noun
heavy-hearted; depressed; feeling down
Describes a state of feeling emotionally heavy, reluctant, or weighed down, often about facing something or doing something. Used as a na-adjective or noun.
明日の試験のことを考えると気重になる。
I feel heavy-hearted when I think about tomorrow's exam.
彼は気重な様子で仕事に向かった。
He headed to work with a heavy heart.
Compound of 気 (き, 'spirit, mood') and 重 (おも, 'heavy'). The exact historical derivation is uncertain, but the meaning is transparent from its components.