Compound
late Middle English compoune (verb), from Old French compoun-, present tense stem of compondre, from Latin componere ‘put together’. The final -d was added in the 16th century on the pattern of expound and propound . compound1 (sense 2 of the verb) arose through a misinterpretation of the legal phrase compound a felony, which means ‘refrain from prosecuting a felony in exchange for money or other consideration’. This led to the use of compound in legal contexts to mean ‘make something bad worse’, which then became accepted in general usage.
wiktionary
Possibly from Malay kampong, kampung(“group of buildings, village”), via Dutch or Portuguese. [1]
From Middle English compounen, from Middle French componre, compondre(“to put together”), from Latin componō, from Latin com-(“together”) + ponō(“to put”).
etymonline
compound (v.)
late 14c., compounen, "to put together, to mix, to combine; to join, couple together," from Old French compondre, componre "arrange, direct," and directly from Latin componere "to put together," from com "with, together" (see com-) + ponere "to place" (see position (n.)). The unetymological -d appeared 1500s in English by the same process that yielded expound, propound, etc. Intransitive sense is from 1727. Related: Compounded; compounding.
compound (n.1)
"enclosed residence," 1670s, "the enclosure for a factory or settlement of Europeans in the East," via Dutch (kampoeng) or Portuguese, from Malay (Austronesian) kampong "village, group of buildings." Spelling influenced by compound (v.). Later used of South African diamond miners' camps (1893), then of large fenced-in residences generally (1946).
compound (adj.)
late 14c., originally compouned, "composed of two or more elements, mixed, blended," past participle of compounen (see compound (v.)). Of flowers from 1660s; compound eye is attested from 1836; compound sentence, one consisting of two or more full clauses, is from 1772.
compound (n.2)
"a compound thing, something produced by the combination of two or more ingredients," mid-15c., from compound (adj.).
