a research student (i.e. a visiting or non-matriculating graduate student) / a researcher

a raw, uncooked state / Short for 生ビール (“draft beer”).

illegitimacy (being born out of wedlock)

(archaic) a woman's brother (regardless of age difference) / (archaic) a woman's lover or husband / (archaic) a familiar man

Kyūjitai form of 私生児 (“illegitimate child”)

a piece of research, a study, investigation

to research, to study

elder/older brother / honorific referencing an older brother figure

elder brother / elder brother-in-law / Short for 花の兄 (hana no ani): alternative name for the 梅 (ume), the Japanese plum (Prunus mume)

(rare) an elder brother