tentative

adj. 试验性的，暂定的；踌躇的

n. 假设，试验

中文词源

tentative 暂定的，不确定的

tent-,接触，触摸，-ative,形容词后缀。即接触性的，引申词义暂定的，不确定的。

tentative (adj.): 1580s, from Medieval Latin tentativus "trying, testing," from Latin tentatus, past participle of tentare "to feel, try." Related: Tentatively; tentativeness.

1. tent- "try, test" + -ative.2. => trying, testing.3. tentative“探探底的”

4. Please come out with your tentative ideas at the meeting.: 请把你的初步设想在会上讲一讲.