| labium | labial |
| labor (n.) | belabor, collaborate, collaboration, collaborator, elaborate, elaborately, elaboration, laboratory, laborer, laborious, laboriously |
| labor (verb) | avalanche, collapse, elapse, lapse, relapse |
| lac | lacteal., lactic, lettuce |
| lacer | lacerate |
| lacertus | alligator, lizard |
| lacrima | lachrymal |
| lacus | lagoon, lake |
| laedo | collide, collision |
| lambo | lambent |
| lamentum | lament, lamentable, lamentably, lamentation, unlamented |
| lamina | omelet |
| lancea | lance, lancet, launch |
| langueo | languid, languidly, languish, languishing |
| laxus | disrelish, lax, laxative, laxity, lease, leash, lessee, relax, relaxation, release, relish |
| lectus | coverlet, litter |
| lego (legare) | s. lex |
| lego (legere) | coil, collect, collection, collective, collectively, collector, cull, diligence, diligent, diligently, elect, election, electoral, electorate, eligibility, eligible, intellect, intellectual, intellectually, intelligence, intelligent, intelligently, intelligentsia, intelligible, lecture, lecturer, legend, legendary, legible, legion, legionary, lesson, neglect, negligee, negligence, negligent, negligently, negligible, predilection, recollect, recollection, re-elect, re-election, sacrilege, sacrilegious, select selection, select, selective, selectman, unintelligible |
| legumen | legume, leguminous |
| lenis | leniency, lenient, lenity |
| lens | lentil |
| lentus | relent, relentless, unrelenting |
| levis | alleviate, carnival, elevate, elevated (adj.), elevation, elevator, leverage, levity, levy, relevancy, relevant relief, relieve, unleavened |
| lex | allegation, colleague, college, collegiate, delegate, illegal, illegitimate, leal, legacy, legal, legality, legalize, legally, legate, legation, legislate, legislation, legislative, legislator, legislator, legislature, legitimacy, legitimate, loyal, loyalist, loyally, loyalty, privilege, privileged, relegate |
| liber | deliver, deliverance, deliverer, delivery, illiberal, liberal, liberalism, liberality, liberate, liberation, liberty, livery |
| libe | libation |
| libra | deliberate, deliberately, deliberation, equilibrium, level, leveler, levelly, lira |
| licet | illicit, leisure, license, licentiate, licentious, licentiousness |
| licium | trellis |
| lignun | lignite |
| ligo | alliance, allied (adj.), alloy, ally, league, liability, liable, liaison, lien, ligament, ligament, ligature, obligate, obligation, obligation, oblige, obliging (adj.), rally, reliability, self-reliance, self-reliant, unalloyed, unreliable |
| limbus | limbo |
| limen | elimination, elimination, preliminary |
| limes | illimitable, limit, limitation, limited (adj.), limitless, lintel, unlimited |
| lilmpidus | limpid |
| lingua | language, linguistic |
| lino | liniment |
| linquo | delinquency, delinquent, derelict, dereliction, relic, relinquish, relique |
| linum | align, alignment, crinoline, delineation, headline, line, lineage, lineal, lineament, linear, lineman, linen, lingerie, lining (n.), linnet, linseed, lint, outline, shoreline, underlines, waistline |
| liqueo | deliquescent, liquefaction, liquefy, liquid, liquidate, liquidation, liquor, prolix, prolixity |
| lira | delirious, delirium |
| lis | litigant, litigation, litigious |
| littera | alliteration, illiteracy, illiterate, letter, lettered, letterhead, lettering, literacy, literal, literally, literary, literature, obliterate, unlettered |
| liveo | livid |
| locus | collocation, couch, couchant, dislocate, lieu, lieutenant, local, locality, localize, locally, locate, location, locomotion, locomotive |
| locusta | lobster, locust |
| longus | elongate, elongation, longevity, longitude, longitudinal, lunge, oblong, prolong, prolongation, purloin |
| loquor | circumlocution, colloquial, colloquy, elocution, eloquence, eloquent, eloquently, loquacious, obloquy, soliloquy, ventriloquist |
| lubricus | lubricant, lubricate, lubrication, lubricator |
| luceo | elucidate, elucidation, lucent, lucid, lucidity, lucubration, pellucid, translucent |
| lucrum | lucrative, lucre |
| luctor | reluctance, reluctant, reluctantly |
| ludus | allude, allusion, collusion, delude, delusion, delusive, disillusion, disillusionment, elude, elusive, illusion, illusive, illusory, interlude, ludicrous, prelude |
| lugeo | lugubrious |
| lumbus | loin, lumbar, sirloin |
| lumen | illume, illuminate, illumination, illumine, limn, liminary, luminous |
| luna | interlunar, lunacy, lunar, lunatic |
| luror | lurid |
| lustro | illustrate, illustration, illustrative, illustrator, illustrious, lackluster, luster, lustrous |
| luxus | luxuriance, luxuriant, luxurious, luxuriously, luxury |
| lympha | lymph, lymphatic |
