doleful

As adjectives the difference between sullen and doleful

is that sullen is having a brooding ill temper; sulky while doleful is filled with grief, mournful, bringing feelings of sadness.

As a noun sullen

is (obsolete) one who is solitary, or lives alone; a hermit.

As adjectives the difference between doleful and false

is that doleful is filled with grief, mournful, bringing feelings of sadness while false is (label) one of two states of a boolean variable; logic.

As adjectives the difference between doleful and undefined

is that doleful is filled with grief, mournful, bringing feelings of sadness while undefined is lacking a definition or value.

As an adjective doleful

is filled with grief, mournful, bringing feelings of sadness.

As a verb grieved is

(grieve).

Ominous is a related term of doleful.

As adjectives the difference between ominous and doleful

is that ominous is of or pertaining to an omen or to omens; being or exhibiting an omen; significant while doleful is filled with grief, mournful, bringing feelings of sadness.

As a noun doldrums

is a part of the ocean near the equator, abounding in calms, squalls, and light, baffling winds, which sometimes prevent all progress for weeks – so called by sailors.

As an adjective doleful is

filled with grief, mournful, bringing feelings of sadness.

As adjectives the difference between melancholic and doleful

is that melancholic is filled with or affected by melancholy—great sadness or depression, especially of a thoughtful or introspective nature while doleful is filled with grief, mournful, bringing feelings of sadness.

As a noun melancholic

is a person who is habitually melancholy.

As an adjective doleful

is filled with grief, mournful, bringing feelings of sadness.

As a noun dolor is

pain, grief, sorrow, woe.