momentarily（adv.）
1650年代，“瞬间地”，来自于 momentary + -ly (2)。意思是“任何时刻”于1928年得到证实。
momentarily, momently. The first means for a moment (he was momentarily abashed), the second from moment to moment or every moment (am momently expecting a wire from him). The differentiation is well worth more faithful observance than it gets; & the substitution of either, which sometimes occurs, for instantly or immediately or at once is foolish novelty-hunting. [Fowler, 1926]
momentarily, momently。前者意为“瞬间的” (he was momentarily abashed)，后者意为“每时每刻的” (am momently expecting a wire from him) 。两者之间的区别值得更加认真的观察； 而有时将任意一个词代替 instantly 或 immediately 或 at once 是愚蠢的新奇寻求。【福勒，1926】
该词起源时间：1650年代