trepidation

As a verb perturbed

is (perturb).

As an adjective perturbed

is disturbed; flustered.

As a noun trepidation is

trembling.

As nouns the difference between trepidation and suspense

is that trepidation is trembling while suspense is the condition of being suspended; cessation for a time.

As an adjective suspense is

(obsolete) held or lifted up; held or prevented from proceeding.

As a noun trepidation

is trembling.

As an adjective false is

(label) one of two states of a boolean variable; logic.

As nouns the difference between trepidation and diffidence

is that trepidation is trembling while diffidence is the state of being diffident, timid or shy; reticence or self-effacement.

As an adjective formidable

is causing fear, dread, awe or admiration as a result of size, strength, or some other impressive quality; commanding respect; causing wonder or astonishment.

As a noun trepidation is

trembling.

As a noun trepidation

is trembling.

As an adverb hesitantly is

with hesitation.

As a noun trepidation

is trembling.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between trepidation and palpitation

is that trepidation is trembling while palpitation is an abnormal awareness of the beating of the heart.

As an adjective voluble

is (of a person or a manner of speaking) fluent or having a ready flow of speech; garrulous or loquacious; tonguey.

As a noun trepidation is

trembling.

As a noun trepidation

is trembling.

As a verb prognosticate is

to predict or forecast, especially through the application of skill.