1. com- "together" + -pound (pon-).
2. 含义：put together, mix, combine.
3. It is on the analogy of expound, etc.
com-, 强调。-pon, 放置，词源同opponent, position. 即放在一起的。
compound: There are two distinct words compound in English. The one meaning ‘combine’  comes ultimately from Latin compōnere ‘put together’. Old French took two verbs from this: the perfect stem composproduced composer (whence English compose) while the infinitive became compondre, source of English compound. Its original Middle English form was compoune; the final d came from the adjectival use of the past participle compouned. Compound ‘enclosure’  is of Eastern origin: it comes from Malay kampong ‘group of buildings, village’, and was borrowed via Portuguese campon or Dutch campoeng.
The English form was no doubt remodelled on the basis of compound ‘combine’. => compose, composite, position
"to put together," late 14c., compounen "to mix, combine," from Old French compondre, componre "arrange, direct," from Latin componere "to put together" (see composite). The -d appeared 1500s in English on model of expound, etc. Related: Compounded; compounding.
"a compound thing," mid-15c., from compound (adj.).
1670s, via Dutch (kampoeng) or Portuguese, from Malay kampong "village, group of buildings." Spelling influenced by compound (v.). Originally, "the enclosure for a factory or settlement of Europeans in the East," later used of South African diamond miners' camps (1893), then of large fenced-in spaces generally (1946).
late 14c., originally compouned, past participle of compounen (see compound (v.)). Compound eye is attested from 1836; compound sentence is from 1772.
1. Police fired on them as they fled into the embassy compound.
2. The less stable compounds were converted into a compound called Delta-A THC.
3. This sticky compound adheres well on this surface.
4. The compound was hidden by trees and shrubs.
5. Common salt is a compound of sodium and chlorine.