A way to hold this word: something is going to move, and this is the stuff that does the pushing. It is never the thing you care about — not the rocket, not the paint — only what drives it. In both uses a gas rushes out one way and the thing you wanted goes the other way; the difference is only whether the gas is made by burning or was pumped in and shut up under pressure.
From the word’s history
From propel plus -ant, the ending that names the thing doing the action, so the word is simply 'the thing that propels'.
由 propel（推動）加上 -ant（做這個動作的東西）組成，字面就是「推東西的那一份材料」。
Wiktionary entry for propellant, supplied in this packet (kaikki:3f6f69a190036ae4:1008494628): 'From propel + -ant.'
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原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
propellantnoun
- 1
anything that propels
- 2
anything that propels
- Then they backed the membrane with a gel matrix containing a perfluorocarbon (PFC) propellant and fluorescent "nanobullets" about a micron wide, and hit it with ultrasound.
- 3
anything that propels
這個拼法也被記錄為下列字的變化形：
- propellent
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。