Where does “oplas” come from?

oplas (Indonesian) comes from Indonesian operasi, from Dutch operatie, from French opération, from Latin operātiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere — small stone, pebble; gravel, rubble.

Ancestry of “oplas”, step by step

oplas traces back through two separate lines of ancestry.

via Indonesian operasi

StepLanguageWordMeaning
1Indonesianoperasioperation
2Dutchoperatieoperation; operation, procedure, surgery
3Frenchopérationoperation
4Latinoperātiōoperation
5Latin-tiōtion, -ation, -ing
6Latindissertātiō(spoken) dissertation, discourse, disquisition
7Latindissertusarranged, disposed; explained
8Latindissereresecond-person singular future passive indicative...
9Latindis-asunder, apart, in two; reversal, removal;...
10Latincalceusshoe
11Latincalxlimestone; chalk; the finish line
12Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via Indonesian plastik

StepLanguageWordMeaning
1Indonesianplastikplastic
2Dutchplastiekplastic synthetic polymer
Every word from Ancient Greek χάλιξ
oplas — Etymology, Origin & Word History | Etymology Explorer