• 劣おとる — to be inferior / to fall short
• 劣勢れっせい — disadvantage / inferior position
• 劣等れっとう — inferiority
• 劣悪れつあく — poor quality / inferior condition
• 優劣ゆうれつ — superiority and inferiority
• 劣化れっか — deterioration / decline
• 劣性れっせい — recessive (genetic) / weakness

Formed from 力 (strength) and 少 (few), it means “less strength.” It expresses weakness or being outmatched — both physically and figuratively.