no matter how (much)
Expresses 'no matter how much' or 'even if to any degree', emphasizing that a result or situation holds regardless of the extent.
This pattern is used to say that no matter how much you do something or how extreme a condition is, the outcome is the same. It often combines with どんなに to mean 'no matter how (much)'. The ても part can be attached to verbs, い-adjectives, な-adjectives, and nouns, but the form changes: verbs and い-adjectives use て/で forms, while な-adjectives and nouns take でも. The pattern is common in both speaking and writing, though in casual speech どんなに is often shortened to どんだけ (but that's very informal). The emphasis is on the speaker's feeling that the effort or condition is extreme, yet the result doesn't change.