four / fourth / quadruple / here and there

four / fourth

round the clock / all the time

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

理論: a theory

論: theory, argument, view

論理: logic

ロシア, 露西亜, 魯西亜: Russia (country)