definitely

As an adverb definitely

is without question and beyond doubt.

As an adjective essential is

necessary.

As a noun essential is

a necessary ingredient.

As adverbs the difference between definitely and explicitly

is that definitely is without question and beyond doubt while explicitly is in an explicit manner.

As adverbs the difference between genuinely and definitely

is that genuinely is in a genuine manner; truthfully, truly while definitely is without question and beyond doubt.

As adverbs the difference between definitely and unequivocably

is that definitely is without question and beyond doubt while unequivocably is in an unequivocable manner.

As adverbs the difference between relatively and definitely

is that relatively is proportionally, in relation to some larger scale thing while definitely is without question and beyond doubt.

As adverbs the difference between definitely and extremely

is that definitely is without question and beyond doubt while extremely is (degree) to an extreme degree.

As adverbs the difference between definitely and specifically

is that definitely is without question and beyond doubt while specifically is in a specific manner, applying to or naming a particular thing or things, expressly, explicitly.

As an adverb definitely

is without question and beyond doubt.

As a proper noun did is

sun (sunday).

As an adverb definitely

is without question and beyond doubt.

As a noun finity is

(rare|uncountable) the state or characteristic of being limited in number or scope.

As adverbs the difference between definitely and carefully

is that definitely is without question and beyond doubt while carefully is (lb) sorrowfully.