the past / ancient times

old

(not of a person) old, aged, antiquated

a house / one's own home / a home, household / a family

the way one feels unsettled due to fright / the way one is upset

論: theory, argument, view

理論: a theory

The hiragana syllable ろ (ro). Its equivalent in katakana is ロ (ro). It is the forty-third syllable in the gojūon order; its position is ら行お段 (ra-gyō o-dan, “row ra, section o”).

炉: furnace, kiln

(endearing) denotes endearment