Science & Technology:
* Biology: From *bios* (life) and *logos* (study)
* Physics: From *phusis* (nature)
* Chemistry: From *chemeia* (alchemy)
* Psychology: From *psyche* (soul) and *logos* (study)
* Telephone: From *tele* (far) and *phone* (sound)
* Television: From *tele* (far) and *vision* (sight) (Note: "vision" itself has Latin roots, but the *tele* prefix is Greek)
* Telescope: From *tele* (far) and *skopein* (to look)
* Helicopter: From *helikos* (spiral) and *pteron* (wing)
Philosophy & Politics:
* Democracy: From *demos* (people) and *kratos* (power)
* Philosophy: From *philein* (to love) and *sophia* (wisdom)
* Politics: From *polis* (city)
* Monarchy: From *monos* (one) and *arkhein* (to rule)
* Ethics: From *ethos* (character, custom)
Medicine:
* Doctor: From *docere* (Latin for "to teach"), but the original concept and many medical terms derive from Greek.
* Diagnosis: From *dia* (through) and *gnosis* (knowledge)
* Therapy: From *therapeia* (treatment)
* Hypnosis: From *hypnos* (sleep)
Everyday Words:
* School: From *schole* (leisure, free time; originally referring to philosophical discussion)
* Chaos: From *khaos* (a gaping void)
* Drama: From *dran* (to do, to act)
* Technician: From *techne* (art, skill)
* Hypothesis: From *hypo* (under) and *thesis* (statement, proposition)
* Oxygen: From *oxys* (sharp, acid) and *genes* (producing)
Prefixes & Suffixes:
Many prefixes and suffixes common in English are of Greek origin, significantly impacting the vocabulary:
* -logy: (study of), as in biology, geology
* -graphy: (writing, description), as in biography, geography
* -meter: (measure), as in thermometer, barometer
* auto-: (self), as in autobiography, automatic
* geo-: (earth), as in geology, geography
* micro-: (small), as in microscope, microorganism
* mega-: (large), as in megaphone, megabyte
This is only a small sampling. Greek significantly influenced Latin, and Latin in turn significantly influenced English. Therefore, many words seemingly of Latin origin also have underlying Greek roots. Consulting an etymology dictionary will reveal the Greek origins of countless more words.