rigidly Synonyms

austerely strictly studiedly tightly unchangeably adamantly bureaucratically mechanistically motionlessly obdurately stubbornly enduringly rigorously stiltedly stringently tenaciously unassailably uncompromisingly stiffly sternly statically bolt chidingly clammily dogmatically fixedly immovably implacably inclemently inexorably inflexibly invectively prescriptively securely solidly soundly stably starchly unwaveringly