open one's mouth (and begin to speak)

opening an airport or port / opening a port to international trade

open an airport or port / open a port to international trade

(geology) oceanic trench

(science fiction) mysterious ray / beam

(chiefly women's speech) first person singular pronoun: I, me

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness

(formal) first-person singular pronoun: I, me

personal, private / secret