σφαῖρα
sphaîra
“ball, sphere”
19 words in English grow from this root.
Asthenosphere
Earthἀσθενήςasthenḗs
“weak sphere”
Atmosphere
Scienceἀτμόςatmós
“sphere of vapour”
Bathysphere
Scienceβαθύςbathýs
“deep ball”
Biosphere
Natureβίοςbíos
“life sphere”
Chromosphere
Earthχρῶμαchrôma
“colour sphere”
Cryosphere
Earthκρύοςkrýos
“frost sphere”
Ergosphere
Earthἔργονérgon
“work sphere”
Exosphere
Earthἔξωéxō
“outer sphere”
Heliosphere
Earthἥλιοςhḗlios
“sun sphere”
Hemisphere
Earthἡμι-hēmi-
“half a ball”
Hydrosphere
Earthὕδωρhúdōr
“water ball”
Ionosphere
Earthἰόνión
“sphere of the going ones”
Lithosphere
Earthλίθοςlíthos
“stone sphere”
Magnetosphere
Earthμαγνῆτις λίθοςmagnêtis líthos
“magnet sphere”
Mesosphere
Earthμέσοςmésos
“middle sphere”
Photosphere
Earthφῶςphôs
“light sphere”
Sphere
Scienceσφαῖραsphaîra
“a ball”
Thermosphere
Earthθερμόςthermós
“heat sphere”
Troposphere
Earthτροπήtropḗ
“turning sphere”