全く～ない【まったく～ない】

The expression まったく全く～ない means "not at all" or "not in the least." It is used to emphasize a complete negation – the speaker is asserting that something is entirely absent, untrue, or nonexistent.

まったく全く (まったく) is an adverb that modifies a negative verb or adjective, strengthening the negation to its fullest degree.

With verbs

Place まったく全く before the negative verb to express that an action does not happen at all.

With い-adjectives

Place まったく全く before the negative form of an い-adjective.

With な-adjectives and nouns

Use まったく全く before a な-adjective or noun followed by ではない / じゃない.

Nuance

まったく全く carries a strong, emphatic tone. It is more forceful than あまり+ない ("not very") or ぜんぜん+ない ("not at all"), though ぜんぜん全然 and まったく全く are often interchangeable. まったく全く tends to sound slightly more formal or literary than ぜんぜん全然. まったく全く can also be used **without a negative** in literary or formal contexts to mean "truly" or "completely" (e.g. まったく全くそのとおりその通りだ – "That's exactly right"), but the ～ない pattern covered here is its most common usage.