invariable
adjective formal uk/ɪnˈveə.ri.ə.bəl/ us/ɪnˈver.i.ə.bəl/
不变的，始终如一的
staying the same and never changing
Michael's invariable reaction was anger and a reluctance to try anything new. 迈克尔的反应始终是愤怒和不愿意尝试新事物。
Opposite: variable