(set theory) union

concept, general idea

to study / to learn

teach; to instruct; give a lesson

instruction; teaching; school; lesson, class

gathering, assembly / an assortment / (mathematics) set

mathematics (field of study)

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

gather, assemble, aggregate

a personal or private matter / selfishness / privacy, secrecy / (women's speech, obsolete) a brother-in-law