How do you pronounce 椿?

Q: How do you pronounce 椿? A: ceon1, e.g.

椿 (ceon1) — meaning, pronunciation, examples

椿 (ceon1, chūn) — Chinese toon (Toona sinensis); tree of heaven (Ailanthus altissima); (literary metaphor) father; parents; a surname

椿萱 (ceon1 hyun1) — parents (outdated term)
椿象 (ceon1 zoeng6) — stinkbug
循例 (ceon4 lai6) — act upon rules
循序 (ceon4 zeoi6) — adj; in proper order or sequence
循環 (ceon4 waan4) — recycle
旬刊 (ceon4 hon2) — a magazine that is published every 10 days