1
something is useless
表示某物没有用或失去效用。
This old phone is useless.
这部旧手机没用了。
无用的；没有用处的；没法用的
先理解核心含义，再看它在真实句子里的用法。
无用的；没有用处的；没法用的
having no use, benefit, or ability to serve a purpose
This old phone is useless.
这部旧手机没用了。
无用的,不能使用的
Without use or the possibility to be used.
没有益处或无法有效运作
having no beneficial use or incapable of functioning usefully
无益的,无用的；无意义的(指行动)
Unhelpful, not useful; pointless (of an action).
This old map is useless now that the city has changed.
城市变了以后，这张旧地图就没用了。
AI contextual example
I tried to fix the printer, but it is completely useless.
我试着修打印机，但它完全没用了。
AI contextual example
It's useless to argue with him; he won't listen.
跟他争论是没用的；他不会听的。
AI contextual example
a kitchen full of useless gadgets
一个满是无用小器具的厨房。
WordNet
表示某物没有用或失去效用。
This old phone is useless.
这部旧手机没用了。
表示做某事没有结果或意义。
It is useless to argue with him.
和他争论是没有用的。
说明某物对特定用途无效。
This tool is useless for cutting wood.
这个工具切木头没用。
表示某人或某物在某个角色或方面无用。
He is useless as a manager.
他作为经理很没用。
Not this
This tool is uselessly.
Use this
This tool is useless.
错误使用了副词 uselessly 代替形容词 useless。在系动词后应用形容词作表语，表示主语的特征。
Not this
It is useless for try again.
Use this
It is useless to try again.
错误使用了介词 for 后接动词原形。正确的结构是 it is useless to do something，不定式作主语。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
完全无用的
This old software is completely useless now.
这个旧软件现在完全无用了。
绝对无用的
That advice was absolutely useless.
那个建议绝对无用。
几乎无用的
The broken tool is virtually useless.
那个坏掉的工具几乎无用了。
没用的垃圾
My phone is a useless piece of junk after the drop.
我的手机摔过后就成了没用的垃圾。
浪费时间而无用
The meeting was a useless waste of time.
那个会议是浪费时间的无用之事。
无用的知识
I've filled my head with useless knowledge.
我脑子里装满了无用的知识。
像巧克力茶壶一样没用
This old smartphone is as useless as a chocolate teapot.
这部旧智能手机像巧克力茶壶一样没用。
像潜艇上的纱门一样没用
His suggestion was as useless as a screen door on a submarine.
他的建议像潜艇上的纱门一样没用。
像防水茶包一样没用
That tool is as useless as a waterproof teabag.
那个工具像防水茶包一样没用。
你是个废物，蛆虫！
This old computer is completely useless.
这台旧电脑完全没用了。
这没用，没用，没用
Trying to change his mind is useless.
试图改变他的想法是没用的。
Use useless naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
useless拆成use（使用）和less（少），使用少即无用。
常见场景：日常对话、书面写作 该词语域中性，适用于多种场合，常见于批评或客观评价。
These words all end with the suffix '-less' and share the same unstressed /ləs/ ending. However, they do not rhyme with 'useless' because their stressed vowels differ (e.g., /oʊ/, /ɪr/, /iː/, /aɪ/, /ɛ/ vs. /uː/). They are useful lookalikes in spelling but not perfect rhymes.
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.