IPA: /ˈhæpiər/
KK: /ˈhæp.i.ɚ/
Feeling or showing more joy or contentment than before.
She felt happier after spending time with her friends.
Comparative: happier
Superlative: happiest
Happier → It is formed from "happy" (from Old English "hap", meaning chance or fortune) and the suffix "-er" (meaning one who or more). The word "happier" means one who is more fortunate or has more happiness than another.
Think of someone who is 'more fortunate' ('hap') — that's why happier means feeling more happiness.