oknum

Borrowed from Arabic أُقْنُوم (ʔuqnūm), ultimately from Classical Syriac ܩܢܽܘܡܳܐ (qnōmā, “self, essence, person, hypostasis”). "Infamous person" sense was only popularized by Mochtar Lubis in late 1960, themed around PKI.

Some people might think that this word was borrowed from Latin ocnus (although this word doesn't exist in Latin) due to "-um" suffix in this word (okn"um"), which is the inflection of "-us", one of the most common Latin suffixes.

oknum

1. (derogatory) infamous, notorious (of a person)

   oknum polisi

   (infamous/bad) police

oknum (plural oknum-oknum)

1. (theology, Christianity) person, hypostasis
2. (obsolete) individual, person

   Synonyms: orang, individu

3. (derogatory) infamous party, individual, elements, person

• → Tetum: oknum

• “oknum” in Kamus Besar Bahasa Indonesia, Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016.