adj.有目的的，故意的
Merriam-Webster Online Dictionary
purposeful (adjective)1.
having a as - purpose
a) - meaningful purposeful activities
b) - intentional purposeful ambiguity
2.
full of determination - was soft-spoken but purposeful
Merriam-Webster Online Thesaurus
purposeful (adjective)1.
fully committed to achieving a goal
SYNONYMS:
bent (on upon), bound, decisive, do-or-die, firm, hell-bent (on upon), intent, out, purposeful, resolute, resolved, set, single-mindedRELATED WORDS:
bitter, vehement; certain, cocksure, confident, positive, sure; earnest, serious; steady, unfaltering, unhesitating, unswerving, unwavering; adamant, adamantine, dogged, hard, hardened, hardheaded, headstrong, immovable, implacable, inflexible, mulish, obdurate, persistent, pertinacious, perverse, pigheaded, rigid, self-willed, stubborn, tenacious, unbending, uncompromising, unrelenting, unyielding, willful ( wilful)NEAR ANTONYMS:
distrustful, doubtful, dubious, mistrustful, skeptical, suspicious, uncertain, unconvinced, undecided, unsettled, unsure; disinclined, indisposed, loath ( loth loathe), reluctant2.
made, given, or done with full awareness of what one is doing
SYNONYMS:
conscious, deliberate, intended, knowing, purposeful, purposive, set, voluntary, willed, willful ( wilful), wittingRELATED WORDS:
designed, planned; conscious; advised, calculated, considered, measured, reasoned, studied, thoughtful, weighed; premeditated, premeditative, prepense; discretionary, elective, optional, volunteerNEAR ANTONYMS:
inadvertent, unwitting; accidental, chance, haphazard, hit-or-miss, incidental, random; aimless, desultory, purposeless; abrupt, impetuous, sudden; coerced, forced, involuntary; compulsory, mandatory, necessary, nonelective, obligatory, ordered, required; casual; extemporaneous, impromptu, impulsive, instinctive, spontaneous, unforced, unpremeditated