こちんこちん

(1)taut or rigid; stretched tight; "tense piano strings"

(2)きつく張られている、または堅いさま

(3)きつく伸ばされたさま

(4)showing signs of mental and emotional tension; "her voice was strained as she asked the question"

(5)精神的で感情的な緊張の徴候を示すさま

(6)in or of a state of physical or nervous tension

(7)身体的または神経質の緊張の状態にある