zestless

is likely misspelled.

has no English definition.

As an adjective zestless

is lacking zest; passionless, unenthusiastic.

As adjectives the difference between zestless and restless

is that zestless is lacking zest; passionless, unenthusiastic while restless is not allowing or affording rest.

As adjectives the difference between zestless and nestless

is that zestless is lacking zest; passionless, unenthusiastic while nestless is without a nest.

As adjectives the difference between vestless and zestless

is that vestless is without a vest while zestless is lacking zest; passionless, unenthusiastic.

As an adjective zestless

is lacking zest; passionless, unenthusiastic.

As a noun zestlessness is

the state or condition of being zestless; lack of passion or enthusiasm.

Zestlessly is a derived term of zestless.

As an adverb zestlessly

is in a zestless way.

As an adjective zestless is

lacking zest; passionless, unenthusiastic.

As adjectives the difference between unenthusiastic and zestless

is that unenthusiastic is without enthusiasm; unexcited while zestless is lacking zest; passionless, unenthusiastic.

As adjectives the difference between passionless and zestless

is that passionless is lacking in passion while zestless is lacking zest; passionless, unenthusiastic.

As a noun zest

is the outer skin of a citrus fruit, used as a flavouring or garnish.

As a verb zest

is to scrape the zest from a fruit.

As an adjective zestless is

lacking zest; passionless, unenthusiastic.