нерешительный

1) General subject: can't say boo to a goose, deliberate, double minded, double-minded, doubtful, doubting, dubitative, faint hearted, faint-hearted, faltering, fearful, feeble minded, flaccid, half and half, half hearted, half-and-half, half-hearted, hesitant, hesitative, hesitatory, indecisive, infirm, infirm of purpose, irresolute, off again on again, off-again on-again, on again off again, on-again-off-again, pluckless, shilly-shally, shillyshally, shy, suspensive, twofold, undecided, undetermined, unready, unresolved, unsteadfast, vacillating, vacillatory (о человеке), waffling, wanting in purpose, weak, weak hearted, weak kneed, weak minded, weak-hearted, weak-kneed, weak-minded, wishy washy, wishy-washy, dithering, head-scratcher, ditherer, marginal

2) Colloquial: sticky

3) Bookish: ephectic

4) Rare: pendulant, pendulent, pendulous, vacillant

5) Law: feeble-minded

6) Jargon: soft-head, in a dither, shook

7) Psychoanalysis: vague

8) Makarov: indeterminate, tentative, uncertain

9) Taboo: candyass, slow