IPA: /tɜːrˈpiːn.ləs/
KK: /tɜrˈpiːn lɛs/
Describing something that does not contain terpenes, which are organic compounds found in many plants that contribute to their aroma and flavor.
The terpeneless oil is preferred for its neutral scent.
Terpeneless is formed from "terpene" (from the Greek "terpene", meaning to be pleasant or to delight) and "-less" (meaning without). The word describes something that is without terpenes, which are organic compounds that often have a pleasant smell.
Think of 'terpene' as something that brings a pleasant scent, and remember that 'terpeneless' means lacking that pleasant smell.