difficult / hard, probably impossible

the assembly or composition of things into a single unified whole / such an assembly or composition / a plan or scheme / preparations / (rare) alternative name for 茗荷 (myōga): myoga or Japanese ginger

to assemble or compose things into a single unified whole / to plan or scheme / to prepare

splendid, wonderful / fine, sufficient, tolerable / (in response to an offer) no thank you, all right, fine, enough / of unspecified gravity

quite

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

(informal) no problem

unthinkable, out of the question

practical question (problem)

matter of life or death / (idiomatic) an extremely urgent matter