Numerous languages across the Western world have borrowed words, phrases and expressions from the Greek (Hellenic) language.  English, which is presently the most spoken language, has borrowed thousands of words from Greek.  Studies have shown the influence of ancient and modern Greek on Latin-based languages, especially English, the study confirmed that out of a total of 171,146 English words that are currently in use, 42,214 are Greek.  The Oxford Dictionary explains that even though the influence of classical Greek on English has been largely indirect, through Latin and French, out of the 470,000 English words that have been created and used over the years, more than 150,000 have Greek roots.  In medicine, out of the 43,716 words that exist, almost half the words are Greek.

The Greek language is ranked as the richest in the world with 5 million words and 70 million word types, however, only 600,000 Greek words are used today, making Greek vocabulary the largest in the world and 3.5 times bigger than the English vocabulary.  Below is a list of some of the Greek words that are used in the English language:

Acadamy - Acrobat - Air - Airplane - Anatomy - Anchor - Angel - Architect - Aroma - Astronaut - Athlete - Atlas - Atmosphere - Atom - Auto - Base - Bible - Biology - Bishop - Box - Cemetery - Centre - Chair - Chaos - Character - Chorus - Church - Cinema - Climate - Clinic - Comedy - Cosmetic - Cosmos - Cube - Cycle - Decade - Democracy - Devil - Diagram - Dialogue - Diet - Dinosaur - Diplomat - Disc - Drama - Dynasty - Echo - Ecology - Economy - Ecstacy - Electric - Electronic - Energy - Enthusiasm - Episode - Erotic - Ethics - Euro - Europe - Fantasy - Galaxy - Genetic - Geography - Geometry - Giant - Graph - Guitar - Harmony - Helicopter - Hero - History - Horizon - Hormone - Horoscope - Hour - Hymn - Idea - Idol - Irony - Jealous - Kilogram - Kilometre - Kinetic - Lion - Logic - Logo - Lyrics - Machine - Magic - Magnet - Mania - Marathon - Mathematics - Melody - Metaphor - Metre - Method - Microphone - Microscope - Museum - Music - Mystery - Myth - Neon - Nike - Ocean - Olympic - Orchestra - Organism - Orgasm - Oxygen - Panic - Panther - Paper - Paradise - Patriot - Pause - Pepper - Period - Phase - Philosophy - Phobia - Photo - Photography - Physic - Place - Planet - Poem - Pole - Police - Policy - Political - Problem - Program - Psychology - Rhapsody - Rhythm - Sarcasm - Scene - School - Sphere - Sponsor - Stereo - Story - Strategy - Syllable - Symbol - Symmetry - Sympathy - Symphony - System - Tactic - Talent - Technology - Telephone - Telescope - Theatre - Theme - Theory - Therapy - Thermometer - Tone - Tragedy - Treasure - Triumph - Turbo - Type - Utopia - Zone - Zoo - Zoology 

This is a short list of English words that are regularly used by Engish speakers and are taken from the Hellenic Greek language:  

After - Alphabet - Antique - Boss - Bravo - Call - Can - Care - Colony - Day - Difference - Disaster - Disc - Dollar - Encyclopaedia - Excellent - Father - Flower - Humour - Kiss - Mother - Space          So even if you didn't realise it before  . . . you do speak Greek.