tottering
 (a.)蹣跚的,動搖的
 Tot·ter v. i. [imp. & p. p. Tottered p. pr. & vb. n. Tottering.]
 1. To shake so as to threaten a fall; to vacillate; to be unsteady; to stagger; as, an old man totters with age. “As a bowing wall shall ye be, and as a tottering fence.”
 2. To shake; to reel; to lean; to waver.
    Troy nods from high, and totters to her fall.   --Dryden.
 ◄ ►
 tottering
      adj 1: unsteady in gait as from infirmity or old age; "a tottering
             skeleton of a horse"; "a tottery old man" [syn: tottery]
      2: (of structures or institutions) having lost stability;
         failing or on the point of collapse; "a tottering empire"