even if one says

doctor

one's sister regardless of age difference / one's lover or sweetheart who is the subject of marriage or is already married / (archaic, said from a female speaker) a close female companion

one's own younger sister / the wife of one's younger brother; one's sister-in-law / a younger female / (archaic, said from a male speaker) one's sister regardless of age difference

(rare) Same as いもうと (imōto) above

a placename

Same as いもうと (imōto) above

a female given name

younger sister

to say, to tell somebody / to call, to name, to give a name / to cry, to call, to make a noise (such as an animal)