/ˈtentətɪv ||; ˈtɛntətɪv/adj1 (used about plans, etc) uncertain; not definite （指计划等）未确定的，试验性质的
2 (used about a person or his/her behaviour) not confident about what you are saying or doing （指人或行为）没信心的，迟疑的:
a tentative smile/suggestion 踌躇的微笑；试探性建议 ➔tentatively adv