Similar words
froh
froh is lighter, often gladness about one specific thing; glücklich describes a deeper or more general state of happiness.
Similar in other languages
French
heureux
heureux is the French word for the same thing — both mean "happy."
Portuguese
feliz
feliz is the Portuguese word for the same thing — both mean "happy."
Practice
1 What does glücklich mean?
happy
2 Fill the gap: Sie war noch nie so ___ gewesen.
Full sentence: Sie war noch nie so glücklich gewesen. (She had never been so happy before.)
3 Which fingerprint chart matches glücklich?
glücklich: neutral register, core frequency, general domain, positive connotation.