younger paternal half sister

not ... at all

even if ...,...cannot

very, exceedingly, awfully / (before a negative form) not at all, at all, by no means

bright, clever

acquire by birthright / follow in someone's footsteps or position / (clothes) patch / (be) grafted into a tree

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