merciless

As an adjective merciless is

showing no mercy; cruel and pitiless.

As adjectives the difference between terrible and merciless

is that terrible is dreadful; causing alarm and fear while merciless is showing no mercy; cruel and pitiless.

Merciless is a related term of inexorable.

As adjectives the difference between merciless and inexorable

is that merciless is showing no mercy; cruel and pitiless while inexorable is unable to be persuaded; relentless; unrelenting.

Merciless is a related term of flagrant.

As adjectives the difference between merciless and flagrant

is that merciless is showing no mercy; cruel and pitiless while flagrant is obvious and offensive, blatant, scandalous or flagrant can be (obsolete).

Merciless is a related term of black.

As an adjective merciless

is showing no mercy; cruel and pitiless.

As a proper noun black is

.

Merciless is a related term of truculent.

As adjectives the difference between merciless and truculent

is that merciless is showing no mercy; cruel and pitiless while truculent is cruel or savage.

Violent is a related term of merciless.

As adjectives the difference between violent and merciless

is that violent is involving extreme force or motion while merciless is showing no mercy; cruel and pitiless.

As a verb violent

is (archaic) to urge with violence.

As a noun violent

is (obsolete) an assailant.

As adjectives the difference between austere and merciless

is that austere is grim or severe in manner or appearance while merciless is showing no mercy; cruel and pitiless.

Gloomy is a related term of merciless.

As adjectives the difference between gloomy and merciless

is that gloomy is imperfectly illuminated; dismal through obscurity or darkness; dusky; dim; clouded while merciless is showing no mercy; cruel and pitiless.

Unmoved is a related term of merciless.

As adjectives the difference between unmoved and merciless

is that unmoved is not physically moved while merciless is showing no mercy; cruel and pitiless.