unexpected

As a noun remain

is state of remaining; stay.

As a verb remain

is to stay behind while others withdraw; to be left after others have been removed or destroyed; to be left after a number or quantity has been subtracted or cut off; to be left as not included or comprised.

As an adjective unexpected is

not expected, anticipated or foreseen.

As adjectives the difference between unexpected and spontaneous

is that unexpected is not expected, anticipated or foreseen while spontaneous is self-generated; happening without any apparent external cause.

As adjectives the difference between unprecedented and unexpected

is that unprecedented is never before seen or done, without precedent while unexpected is not expected, anticipated or foreseen.

As adjectives the difference between unintended and unexpected

is that unintended is not intended; unplanned while unexpected is not expected, anticipated or foreseen.

As adjectives the difference between unfamiliar and unexpected

is that unfamiliar is strange, not familiar while unexpected is not expected, anticipated or foreseen.

As a noun unfamiliar

is an unfamiliar person; a stranger.

As a noun expectation

is the act or state of expecting or looking forward to an event as about to happen.

As an adjective unexpected is

not expected, anticipated or foreseen.

As adjectives the difference between unexpected and unbelievable

is that unexpected is not expected, anticipated or foreseen while unbelievable is not to be believed.

Nonconforming is a related term of unexpected.

As adjectives the difference between nonconforming and unexpected

is that nonconforming is that does not conform, either to the rules of an established church, or to official regulations while unexpected is not expected, anticipated or foreseen.

Disconnected is a synonym of unexpected.

As adjectives the difference between unexpected and disconnected

is that unexpected is not expected, anticipated or foreseen while disconnected is that is no longer connected.

As a verb disconnected is

past tense of disconnect.

Unexpected is a related term of curt.

As an adjective unexpected

is not expected, anticipated or foreseen.

As a proper noun curt is

a short form of the male given name curtis.