“to release / to set free” in Japanese is 放, read hou, hana (ほう, はな, ほう). It is a Grade 3 Kyōiku kanji, taught in year 3 of Japanese elementary school, and appears in words such as 放送 (broadcasting).
What does 放 mean?
鳥をかごから放す。
Same sound, different character — the classic trap. Compare them side by side: