suddenly

As an adverb suddenly

is happening quickly and with little or no warning; in a sudden manner.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As an adjective untimely

is at an inopportune time.

As an adverb suddenly is

happening quickly and with little or no warning; in a sudden manner.

As an adverb suddenly

is happening quickly and with little or no warning; in a sudden manner.

As an adjective undefined is

lacking a definition or value.

As an adverb suddenly

is happening quickly and with little or no warning; in a sudden manner.

As an adjective unpredictable is

unable to be predicted.

As a noun unpredictable is

an unpredictable thing.

As an adverb suddenly

is happening quickly and with little or no warning; in a sudden manner.

As a verb exploded is

(explode).

As adverbs the difference between presently and suddenly

is that presently is while suddenly is happening quickly and with little or no warning; in a sudden manner.

As adverbs the difference between suddenly and impulsively

is that suddenly is happening quickly and with little or no warning; in a sudden manner while impulsively is in an impulsive manner; with force; by impulse.

As adverbs the difference between unawares and suddenly

is that unawares is unexpectedly or by surprise while suddenly is happening quickly and with little or no warning; in a sudden manner.

As an adjective unusual

is unlike what is expected; differing in some way from the norm.

As an adverb suddenly is

happening quickly and with little or no warning; in a sudden manner.

As adverbs the difference between suddenly and sharply

is that suddenly is happening quickly and with little or no warning; in a sudden manner while sharply is in a sharp manner; pertaining to precision.