卑劣【ひれつ】
mean, contemptible, despicable, dirty, foul, cowardly, base
劣る【おとる】
to be inferior to, to be less good at, to fall behind
劣等感【れっとうかん】
inferiority complex, sense of inferiority
優劣【ゆうれつ】
(relative) merits, superiority or inferiority, quality
劣勢【れっせい】
inferiority (e.g. numerical), inferior position, disadvantage, unfavorable situation, unfavourable situation
劣化【れっか】
deterioration (in quality, performance, etc.), degradation, worsening, (visible) aging, becoming unattractive (due to aging)
劣悪【れつあく】
inferior, coarse, poor quality, inadequate, deteriorated
拙劣【せつれつ】
clumsy, unskillful
見劣り【みおとり】
unfavourable comparison, unfavorable comparison