teeter
/ˈtiːtə(r)/verb
no obj., usu. with adverbial
1- move or balance unsteadily; sway back and forth摇晃, 摇摇欲坠; 蹒跚行走：
she teetered after him in her high-heeled sandals.
她脚穿高跟凉鞋摇摇晃晃地走在他后面。
1.1
- （常作teeter between）figurative be unable to decide between different courses; waver〈喻〉犹豫不决, 举棋不定; 踌躇; 动摇：
she teetered between tears and anger.
她犹豫不决, 不知是该哭还是该生气。
短语
teeter on the brink（或edge）
- be very close to a difficult or dangerous situation处于困境（或危难）的边缘。
词源
mid 19th cent.: variant of dialect titter, from Old Norse titra 'shake, shiver'.