noncommittal

ambiguous careful cautious circumspect discreet equivocal evasive judicious neutral tactful vague wary

buttoned-up clammed up constrained even-steven guarded hush-hush incommunicable indefinite middle-of-the-road on-the-fence politic reserved restrained temporizing tentative unrevealing zipped

careless certain clear decisive definite foolish hasty heedless incautious indiscreet positive rash reckless sure

willing