楽しい

Etymology
→ * →

From. First attested in the  of 712. No Ryukyuan cognates exist; as as result, further derivation. Theories include:
 * A compound of +
 * This is problematic, as nosu has first been attested starting from the early 900s, with no A/B distinction (see for details).
 * From
 * No reading of exists.
 * A borrowing from an unknown language
 * No words resemble *tanV meaning "fun" or "to enjoy".

Adjective

 * 1) pleasant, delightful, fun, enjoyable