sinister

adjective

sin·​is·​ter ˈsi-nə-stər 

 archaic  sə-ˈni-

1

: singularly evil or productive of evil

2

: accompanied by or leading to disaster

3

: presaging ill fortune or trouble

4

a

: of, relating to, or situated to the left or on the left side of something

especially : being or relating to the side of a heraldic shield at the left of the person bearing it

b

: of ill omen by reason of being on the left

5

archaic : unfavorable, unlucky

6

archaic : fraudulent

sinisterly adverb

sinisterness noun

Did you know?

insidious, sinister, or pernicious?

Few would choose to be associated with people or things that are insidious, sinister, or pernicious; all three of these words have decidedly unpleasant meanings, each with its own particular shade of nastiness.

Insidious comes from a Latin word for “ambush” (insidiae), which is fitting, as this word often carries the meanings “deceitful,” “stealthy,” or “harmful in an imperceptible fashion.” The first two meanings may be applied to people or things (“an insidious enemy,” “an insidious plot”), while the last is usually applied to things (“insidious problems,” “insidious sexism”), in particular to the gradual progress of a disease (“an insidious malignancy”).

Sinister comes from a Latin word meaning “on the left side, unlucky, inauspicious.” Although it is commonly used today in the sense “evil” (“a sinister cult leader”; “a sinister plot”), it may also suggest an ominous foreshadowing of some unfavorable turn of events (“a sinister omen”).

Pernicious has largely stayed true to its etymological root, the Latin noun pernicies “ruin, destruction.” Its original meaning in English, “highly injurious or destructive,” usually applies to things (“pernicious apathy,” “pernicious effects”) and medical conditions (“pernicious fever,” “pernicious anemia”). When applied to people, pernicious means “wicked.”

Did you know?

Is sinister unfair to the left-handed?

Sinister has an etymology that might seem a bit biased against the left-handed portion of the population, as this word, which has had naught but disagreeable meanings for over five hundred years now, comes from a Latin word of the same spelling that means “on the left side.” We find this root in other English words, such as the adjective sinistral (“left-handed”) and the adverb sinistrad (“toward the left side”). To make things even more unfair, the Latin word dexter (“on the right side”) has given rise to English words with largely positive meanings, such as dexterity and ambidextrous.

Synonyms

• baleful
• dire
• direful
• doomy
• foreboding
• ill
• ill-boding
• inauspicious
• menacing
• minatory
• ominous
• portentous
• threatening

Choose the Right Synonym for sinister

sinister, baleful, malign mean seriously threatening evil or disaster.

sinister suggests a general or vague feeling of fear or apprehension on the part of the observer.

a sinister aura haunts the place

baleful imputes perniciousness or destructiveness to something whether working openly or covertly.

exerting a corrupt and baleful influence

malign applies to what is inherently evil or harmful.

the malign effects of racism

Examples of sinister in a Sentence

There was something sinister about him.

the movie relies too much on sinister background music to create the suspense that the plot sorely lacks

Recent Examples on the Web

Specifically, Bill becomes increasingly aware of young girls being held and abused by the nuns of his convent, led by a sinister mother superior, Sister Mary (played with dark-eyed, cold-hearted terror by Emily Watson). —Harrison Richlin, IndieWire, 5 Nov. 2024

Elliot Page translates vitality and promise as the young teen, while a blood-freezing Catherine Keener is the sinister embodiment of resentment and cruelty. —Declan Gallagher and Chris Bellamy, EW.com, 31 Oct. 2024

In reality, however, these numbers have fueled a far more sinister purpose — creating millions of synthetic identities. —Frank McKenna, Forbes, 24 Oct. 2024

But come nightfall, this Erie property begins to take on a more sinister vibe. —Sarah Kuta, The Denver Post, 3 Oct. 2024

Word History

Etymology

Middle English sinistre, from Anglo-French senestre on the left, from Latin sinistr-, sinister on the left side, unlucky, inauspicious

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing sinister

• bar sinister
• bend sinister

Kids Definition

sinister

adjective

sin·​is·​ter ˈsin-əs-tər 

1

: especially evil or leading to evil : bad

2

: threatening evil, harm, or danger : ominous

sinisterly adverb

Etymology

Middle English sinistre "unlucky, unfavorable," from Latin sinistr-, sinister "left, on the left side, awkward, unfavorable"; so called because the ancient Romans believed that omens seen on the left side told of bad things to come