an aunt who is younger than one's parent

young / if

"my lord" (towards a young master or a young heir)

young, juvenile / energetic, fresh / immature / lesser in an order, smaller, earlier

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

if; supposing; in case

(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