“thick / generous” in Japanese is 厚, read kou, atsu (こう, あつ). It is a Grade 5 Kyōiku kanji, taught in year 5 of Japanese elementary school, and appears in words such as 厚紙 (thick paper).
What does 厚 mean?
厚い本を読む。
Same sound, different character — the classic trap. Compare them side by side: