闻 + Object / 闻起来 + Adjective/像 + Noun
The verb 闻 (wén) means 'to smell' or 'to sniff.' It is used both for the deliberate act of smelling something and for passively detecting a scent. In the pattern 闻起来, it means 'to smell like,' describing how something smells to the perceiver.
你闻闻这束花,特别香。
Nǐ wénwen zhè shù huā, tèbié xiāng.
Smell this bouquet of flowers — they're especially fragrant.
我一进厨房就闻到了饭菜的香味。
Wǒ yī jìn chúfáng jiù wén dào le fàncài de xiāngwèi.
As soon as I walked into the kitchen, I smelled the aroma of the food.
这杯咖啡闻起来很浓,味道一定不错。
Zhè bēi kāfēi wén qǐlái hěn nóng, wèidào yīdìng búcuò.
This cup of coffee smells very strong — it must taste good.