何(なに)よりBe glad, Be relieved, Most, Best, Above all else, More than anything

何(なに)より, or 何(なに)よりも when emphasized, is a common phrase in Japanese that is used when one wants to express that they are 'glad', 'relieved', or that '(A) is more important than anything'. As this structure is simply a combination of the substitute noun 何(なに) 'what', or 'whatever', and the particle より 'than', the closest literal translation is 'more than anything, (A)'. 何(なに)より is primarily used to express positive feelings when the actual situation may have been worse, but (A) is the most important.

何(なに)より, and 何(なに)よりも most often behave adverbially, meaning that they can be used at the beginning of a sentence, or right before the word they are describing. However, they occasionally come directly before a noun when followed by の.

As in most cases, も just strengthens the phrase slightly, with no other significant change in nuance.