3what adverb
: in what way
▪ What [=how] does it matter? ▪ What does she care? [=why is it important to her?]
▪ What [=how] does it matter? ▪ What does she care? [=why is it important to her?]
so what
informal — used to say that something said or done is not important ▪ She has a glass of wine now and then—so what?
what with
— used to introduce the part of a sentence that indicates the cause of something ▪ What with the freezing temperatures, they nearly died. ▪ What with school and sports, she's always busy. ▪ Things have been difficult for him lately, what with his wife's illness and all.
