断然 だんぜん
danzen

Adverb
Taru Adjective

1. firmly; flatly; resolutely; decisively; absolutely; definitely

Adverb

2. definitely (wrong, different, etc.); absolutely

Adverb

3. by far; far and away; by a long shot; hands down

彼女 かのじょはクラスの なか、断然 だんぜん うたがいちばんうまかった。
kanojowa kurasuno nakade danzen utaga ichiban umakatta.
She was by far the best singer in the class.