Etymology
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Words related to parasite

para- (1)

before vowels, par-, word-forming element, originally in Greek-derived words, meaning "alongside, beyond; altered; contrary; irregular, abnormal," from Greek para- from para (prep.) "beside, near; issuing from; against, contrary to," from PIE *prea, from root *per- (1) "forward," hence "toward, near; against." Cognate with Old English for- "off, away." Mostly used in scientific and technical words; not usually regarded as a naturalized formative element in English.

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entoparasite (n.)
1847; see ento- + parasite. Perhaps from German or French.
parasitic (adj.)

"of pertaining to, or characteristic of a parasite," in any sense, 1620s, from Latin parasiticus, from Greek parasitikos "of or pertaining to a parasite; the trade of a parasite," from parasitos "one who lives at another's expense" (see parasite). Biological sense is from 1731. Related: Parasitical, 1570s in reference to toadies; from 1640s in the biological sense.

parasitism (n.)

"a habitual living on or at the expense of another," 1610s, from parasite + -ism. Biological sense of "vital relation of a parasite to a host" is by 1840.

parasitize (v.)

in zoology, "infest as a parasite," 1880, from parasite + -ize. Related: Parasitized; parasitizing.