How to Write 烯 (xī) — Meaning “Alkene”

Imagine a "rare" (希) chemical reaction that requires "fire" (火) to produce an alkene. The 火 radical reminds you that alkenes are often made by heating, and 希 sounds like 'see'—so you 'see fire' to remember it's a chemical term.

When writing 烯, the left radical 火 must be written as 火 (not 灬) with the last stroke turning into a dot. The right part 希 has a balanced structure: first write ㇒ (slash) then 乂 (cross), then the cloth radical 巾 below. Keep the left and right sides proportional, with the left slightly narrower.

Unlike 炤 (shining light) and 炫 (dazzling display), 烯 is exclusively a chemistry character for alkenes. Visually, 烯 has the right component 希, while 炤 has 召 (summon) and 炫 has 玄 (mysterious). Their meanings are completely unrelated to chemistry.

烯 is a specialized character used in chemical terminology, like 乙烯 (ethylene) for plastic production or 丙烯 (propylene) for synthetic fibers. It is not common in daily conversation but appears in scientific contexts, especially in industries involving petrochemicals or polymer manufacturing.

Common words containing 烯 include: 乙烯 (yǐ xī) — ethylene; 聚乙烯 (jù yǐ xī) — polyethylene; 丙烯 (bǐng xī) — Propylene.