(formal, literary) new, novel / fresh / renewed / 灼: efficacious

to open / to begin an event

to open, lift, uncover, unpack / to bloom / to start, open (a store)

open (intransitive verb)

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

viewing as a problem