Commonly used words:
* Auto: (from "autos" meaning "self") - As in "automobile", "automatic", "autobiography"
* Bio: (from "bios" meaning "life") - As in "biology", "biochemistry", "biosphere"
* Chron: (from "chronos" meaning "time") - As in "chronology", "synchronize", "chronic"
* Geo: (from "ge" meaning "earth") - As in "geography", "geology", "geometry"
* Graph: (from "graphein" meaning "to write") - As in "graph", "graphic", "autograph"
* Hypo: (from "hupo" meaning "under") - As in "hypothermia", "hypotenuse", "hypnosis"
* Mega: (from "megas" meaning "great") - As in "megaphone", "megabytes", "mega-city"
* Micro: (from "mikros" meaning "small") - As in "microscope", "microwave", "microorganism"
* Morph: (from "morphe" meaning "form") - As in "metamorphosis", "morphology", "amorphous"
* Path: (from "pathos" meaning "feeling", "suffering") - As in "sympathy", "empathy", "pathology"
* Phone: (from "phone" meaning "sound") - As in "telephone", "microphone", "phonetics"
* Photo: (from "phos" meaning "light") - As in "photography", "photosynthesis", "photoelectric"
* Poly: (from "polys" meaning "many") - As in "polyglot", "polygon", "polysaccharide"
* Theo: (from "theos" meaning "god") - As in "theology", "atheist", "pantheism"
Less common words, often used in academic or specialized fields:
* A priori: (from "a" meaning "from" and "priori" meaning "before") - Meaning "from what comes before", often used in philosophy and logic
* Catalyst: (from "katalysis" meaning "dissolution") - A substance that speeds up a chemical reaction
* Democracy: (from "demos" meaning "people" and "kratos" meaning "power") - A system of government where power is held by the people
* Epidemic: (from "epi" meaning "upon" and "demos" meaning "people") - A widespread outbreak of a disease
* Euphony: (from "eu" meaning "good" and "phone" meaning "sound") - A pleasing combination of sounds
* Helios: (from "Helios" meaning "sun") - The Greek god of the sun
* Hypothetical: (from "hupo" meaning "under" and "thesis" meaning "statement") - Based on a supposed situation
* Metaphor: (from "meta" meaning "after" and "pherein" meaning "to carry") - A figure of speech that compares two unlike things
* Paradox: (from "para" meaning "beyond" and "doxa" meaning "opinion") - A seemingly contradictory statement
* Philosophy: (from "philos" meaning "love" and "sophia" meaning "wisdom") - The study of fundamental questions about reality, existence, knowledge, and values
* Psyche: (from "psyche" meaning "soul" or "mind") - The human soul or mind
* Thesis: (from "thesis" meaning "statement") - A statement that is put forward for consideration, typically as a starting point for further discussion
* Zenith: (from "zenith" meaning "the highest point") - The highest point reached by something
These are just a few examples; the English language has borrowed many words from Greek throughout history. The influence of Greek on English is evident in various fields, including science, philosophy, politics, and literature.