| bio | life | biology, biodiversity, antibiotic | 
| cap | head, chief | captain, capital, decapitate | 
| ced, ceed, cess | go, move | concede, proceed, success | 
| cred, cre | believe | credit, incredible, creed | 
| dic, dict | say, speak | dictator, predict, jurisdiction | 
| dorm | sleep | dormant, dormitory | 
| duc, duct | lead | duct, introduce, reduction | 
| fact, fect | make, do | factory, manufacture, effect | 
| fid, feder | trust, faith | confidence, federation | 
| flect, flex | bend | deflect, reflect, flexible | 
| geo | earth | geology, geothermal | 
| graph, gram | write, draw | graphic, photography, grammar | 
| hydro | water | hydroelectric, hydroelectricity | 
| log, ology | word, study | logic, psychology | 
| luc, lum, lus | light | translucent, illuminate, lustre | 
| man, manu | hand | manual, manager, manuscript | 
| mit, miss | send | transmit, omit, mission | 
| mob, mot, mov | move | automobile, emotion, remove | 
| mort | death | mortality, immortal, mortify | 
| nov | new | novice, innovation, renovate | 
| phon, son | sound | microphone, supersonic | 
| pon, pos | put, place | postpone, position, deposit | 
| port | carry | portable, reporter, import | 
| rect | right, straight | correct, rectangle, rectify | 
| scrib, script | write | describe, script, inscription | 
| secu,sequ | follow | consecutive, sequence | 
| spec, spect | look at, observe | spectator, spectacle, inspector | 
| struct | build | structure, instruct, destructive | 
| therm | heat | thermometer, thermal | 
| ven, vene | come | convention, intervene | 
| ver, vers | true | verify, conversation, universal | 
| vid, vis | see | video, visit, invisible | 
| viv, vit | alive, life | vivid, revive, vitamin | 
| voc, vok | call, voice | vocal, vocabulary, revoke |