the absence of light; a literal state of being dark

to suggest or communicate something indirectly

to assassinate

done in secret, on the sly, or surreptitiously

in a secret or covert manner; without being observed by others

secretly or privately to oneself, especially concerning internal thoughts, feelings, or decisions

a pre-arranged secret word, phrase, or countersign used to identify oneself or gain access

dim, overcast, or lacking light; in shadow

to plot against someone secretly

secret passage; secret tunnel

dusky; dim

a code word or cryptic language used for secret communication

to hide or conceal something secretly, making it difficult to detect or perceive

gloomy or without hope; discouraging (regarding prospects, a situation, or the future)

secretly; inwardly; on the sly

gloomy or lacking in hope or spirit; pessimistic

submerged reef (rock)

dark; dim

the collapsible, light-tight part of a camera that connects the lens to the body

a secret place; a place in the dark

think to oneself

shadow; umbra

the dark side (of society etc)

secretly; inwardly; on the sly

dark and gloomy; dim

to laugh secretly, inwardly, or in a suppressed manner, often at someone else's expense

to fight openly and maneuver covertly

dark and gloomy

a sudden turn for the better or a new way out appearing when one is in a desperate or difficult situation

(literally and figuratively) dark side

to suggest or signify something indirectly rather than stating it explicitly; to connote or be implicit

to conduct a thorough investigation using both open inquiries and secret observations

privately; secretly; behind closed doors

An attack by a hidden enemy; a stab in the back.

to agree implicitly or for views and outcomes to coincide without prior discussion

all black, no daylight; a world without justice

(physics) dark matter

an unlicensed or unregistered prostitute

to murder someone secretly or in an underhanded way

a hidden sentry or guard post

(photography) darkroom

to renounce a wrong path or bad faction and turn to a righteous one; to leave the darkness for the light

to commit to memory silently or mentally