Focus on the pronunciation of understand
English definition of “understand”
/ˌʌn·dərˈstænd/ v (past tense and past participle understood /ˌʌn·dərˈstʊd/) (KNOW)
› to know the meaning of something, or to know how a person feels and why the person behaves in a particular way: [+ question word] I don’t understand what he means. [T] Is there anyone here who understands English? [T] It was so noisy I couldn’t understand (= recognize) a word he was saying. [I] If you choose not to come, I’ll understand. [T] He claimed that no one ever understood him (= had any sympathy for him or knew what he was feeling). [+ question word] I understand how she feels about the loss of her dog. [T] It is understood that (= Everyone knows and accepts that) you don’t bring food or drinks into the library.