(of an arrangement, agreement, etc. 安排、协议等 not definite or certain because you may want to change it later 不确定的；不肯定的；暂定的 not behaving or done with confidence 踌躇的；犹豫不定的；不果断的
Word Originlate 16th cent.: from medieval Latin tentativus, from tentare, variant of temptare ‘handle, try’.