n.
- 無用；無效；徒勞[U]I had it on the tip of my tongue to ask him why he left home, but the uselessness of it was apparent.
我差點問他為什麼離家，但顯然問也無用。
uselessness
KK:[ˈjuslɪsnɪs] DJ:[ˈjuːslisnis]
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