plural of could

simple past tense of can / Used as a past subjunctive (contrary to fact). / Used to politely ask for permission to do something. / Used to politely ask for someone else to do something.

Something that could happen, or could be the case, under different circumstances; a potentiality.

Eye dialect spelling of could have or could've. / Misconstruction of could have or could've.

(archaic) simple past tense and past participle of can

To need something that would be beneficial.

(double modal / stacked modal, used in some dialects, chiefly Southern US) might be able to (used to soften "could" or make it even more conditional)

(US, sometimes proscribed) To not care at all; to have no concern or interest; to be apathetic.

(idiomatic, anapodoton) Used to characterize a look of strong hostility

simple past tense of could do with / simple past tense of can do with