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be + stainless
stainless 作表语时多用于抽象意义，指声誉、品格等没有污点。
Her reputation is stainless.
她的名声是清白的。
无瑕疵的；清白的
先理解核心含义，再看它在真实句子里的用法。
无瑕疵的；清白的
free from blemishes; spotless
Her reputation is stainless.
她的名声是清白的。
多用于指声誉、人品等
不易腐蚀和变色的合金的。
Describing an alloy that is resistant to corrosion and discoloration.
无瑕疵的；一尘不染的。
Unmarked, spotless.
无罪的；道德纯洁的。
Free from sin; morally pure.
After decades of honest work, she has a stainless reputation in the community.
经过几十年的诚实工作，她在社区里享有清白无瑕的名声。
His stainless service record made him the perfect candidate for the position.
他清白无瑕的工作记录使他成为这个职位的完美候选人。
The judge was known for her stainless integrity throughout her career.
这位法官以整个职业生涯中清白无瑕的操守而闻名。
stainless 作表语时多用于抽象意义，指声誉、品格等没有污点。
Her reputation is stainless.
她的名声是清白的。
stainless 修饰名词时，常与 reputation、record 等表示名声的词语搭配。
He has a stainless record.
他有一份清白的履历。
表示“不锈的”时，stainless 最常见的搭配是 stainless steel（不锈钢）。
This kettle is made of stainless steel.
这把水壶是不锈钢做的。
Not this
This pot is made of stainless.
Use this
This pot is made of stainless steel.
stainless 是形容词，不能单独用作名词表示“不锈钢”这种材料；英语中要用复合名词 stainless steel。汉语“不锈钢”是一个名词，因此容易漏掉 steel。
Not this
This fabric is stainless, so the stain can be wiped off easily.
Use this
This fabric is stain-resistant, so the stain can be wiped off easily.
表达“防污的、耐污的”这一功能性时，应用 stain-resistant。stainless 虽可表示“不锈的”或“无瑕疵的”，但不能准确表达织物“能防止染色”的特性，用于此语境不自然、不地道。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
不锈钢
The sink is made of stainless steel.
这个水槽是不锈钢做的。
清白的名声
She has a stainless reputation in the community.
她在社区里名声清白。
纯洁的品格
The teacher was known for her stainless character.
这位老师以她纯洁的品格而闻名。
Use stainless naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
stain（污渍）+ less（无），没有污渍即“不锈的、无瑕疵的”。不锈钢杯不留污渍，就记住了 stainless。
语域：formal 常见场景：评价名誉或品格时、文学或正式书面文本 表示“名誉清白、无瑕疵”时通常用于较正式的书面语或文学描写，常搭配 reputation、character 等词；日常口语中较少单独这样说。
仅 painless 和 brainless 与 stainless 完全押韵（/ˈeɪnləs/）。sunless 虽以 -less 结尾，但重读元音不同（/ʌ/ vs /eɪ/），不押韵；stillness 拼写近似，但读音为 /ˈstɪlnəs/，注意区分。
Dictionary facts from ECDICT, WIKTIONARY.