disappoint

As verbs the difference between disappoint and downcast

is that disappoint is to displease by eg underperforming or disappoint can be (internet slang) while downcast is (obsolete) to cast or throw up; to turn upward.

As an adjective downcast is

(of eyes) looking downwards.

As a noun downcast is

(computing) a cast from supertype to subtype.

As a letter s

is the letter s with a.

As a verb disappoint is

to displease by eg underperforming or disappoint can be (internet slang).

Oppose is a related term of disappoint.

As verbs the difference between oppose and disappoint

is that oppose is while disappoint is to displease by eg underperforming or disappoint can be (internet slang).

As a noun oppose

is opposite.

As an adjective oppose

is opposite.

As a verb disappoint

is to displease by eg underperforming or disappoint can be (internet slang).

As an adjective false is

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

As an adjective desparate

is .

As a verb disappoint is

to displease by eg underperforming or disappoint can be (internet slang).

As verbs the difference between disgust and disappoint

is that disgust is to cause an intense dislike for something while disappoint is to displease by eg underperforming or disappoint can be (internet slang).

As a noun disgust

is an intense dislike or loathing someone feels for something bad or nasty.

As a verb disappoint

is to displease by eg underperforming or disappoint can be (internet slang).

As an adjective regrettable is

of an event, action, or state, allowing or deserving regret.

As verbs the difference between disgruntle and disappoint

is that disgruntle is to make discontent or cross; to cause being in a bad temper while disappoint is to displease by eg underperforming or disappoint can be (internet slang).

As verbs the difference between dispair and disappoint

is that dispair is to separate (a pair) while disappoint is to displease by eg underperforming or disappoint can be (internet slang).

As a verb disappoint

is to displease by eg underperforming or disappoint can be (internet slang).

As an adjective undefined is

lacking a definition or value.