poised

adj.

[1]	composed , controlled , self-possessed , unflappable , (self-)confident , (self-)assured , dignified , cool-headed , imperturbable , unruffled , cool , staid , reserved , sedate , calm , serene , tranquil , (Colloq) together
[2]	ready , collected , equanimous , standing by , waiting , self-collected , self-contained , prepared , self-possessed
[3]	teetering , hovering , tottering , wavering , suspended , trembling , wobbling , balanced