tentative
adj.
1580s, from Medieval Latin tentativus "trying, testing," from Latin tentatus, past participle of tentare "to feel, try." Related: Tentatively; tentativeness.
〔李〕[tent =to try试验；-ative ⇒“having the quality of trying具有试验性质的”→] a. done as a trial；experimental试验性的；尝试的