reckless; (at) random; haphazard; blind; sudden; abrupt
thoughtless; reckless; rash; excessive; unreasonable; immoderate
complete darkness; total darkness; pitch darkness
without one's knowledge; easily
dark night; moonless night
dark of the heart; depths of the human mind; (arch.) distress about one's beloved child
darkness of the night; black of night; dead of night
stew prepared from ingredients contributed by members of a party, and eaten in the dark for fun
black-market lending; illegal loan
black-market dealings; underhand transactions; shady trading; secret dealings; secret arrangement
joining the dark side; joining the forces of evil
underground world; underground society
no one knows what the future holds; the future is a closed book; (lit.) one sun (unit of measurement) ahead is darkness
complete darkness; total darkness; pitch darkness
black-market channels; illegal channels
to peer into the darkness
illegal website (i.e. websites featuring child pornography, selling drugs, etc.); website encouraging illegal activities; suicide-encouraging website
complete darkness; total darkness; pitch darkness
illegal donation; secret contribution
to cover up; to hush up; to shroud in darkness; to have a secret abortion
black-market lending; illegal loan
black marketeer; black market trader
power behind the throne; éminence grise; kingmaker; wire-puller; (lit.) shadow shogun
shady dealings; illicit business; underground business
illegal part-time job; questionable part-time job
attack under the cover of darkness; surprise attack; sneak attack
complete darkness; total darkness; pitch darkness
black-market dealings; underhand transactions; shady trading; secret dealings; secret arrangement
dark night in the rainy season
losing one's reason due to love; lack of judgment due to love
illegally moonlighting (of a union employee)
illegal price-fixing agreement
Mirkwood (fictional forest)
price-support measures for contraband goods
unauthorized cartel; unauthorised cartel
alternative account (on social media, etc.); hidden account; sub account
doing something without having decided what one's goal for it is; (lit.) a rifle in the dark
the darkness of ignorance
alternative account (on social media, etc.); hidden account; sub account