Learn the roots that
build English.
Stop memorizing disconnected flashcards. Master the classical Latin, Greek, and Anglo-Saxon morphemes that unlock thousands of collegiate words—backed by adaptive SM-2 spaced retrieval and generative AI sentence writing.
Build English Words from Classical Morphemes
Select a prefix, root, and suffix to watch atomic meaning assemble into high-utility English vocabulary.
“in-tract-able”
This specific affix combination is an exploratory formation. Try clicking a preset above (e.g. intractable, retrospective, or contradict) to view verified curriculum items!
How Radix Builds Permanent Mastery
Traditional vocabulary programs test passive recognition. Radix trains generative morphological reasoning through a three-part cognitive loop.
1. Deconstruct
Break unfamiliar academic polysyllabic words down to their Latin, Greek, and Anglo-Saxon stems. Learn why tract means “pull”, and instantly decipher 20+ derivative words without guessing.
2. Spaced Retrieval
Adaptive SM-2 scheduling calculates optimal memory consolidation intervals. Targeted distractor matrices force discriminative recall rather than shallow elimination tricks.
3. Synthesize & Write
Passive knowledge becomes active fluency. Compose original sentences using target roots, evaluated in real time by our AI writing coach for semantic accuracy, grammar, and formal collegiate register.
The Greek & Latin Twin Stems
English has duplicate roots for identical concepts. Master one twin, and you unlock both the scientific lexicon and literary prose.
chron
Primary Register: Science, Medicine & History
Occurring or existing at the exact same point in time
Something placed outside its proper historical chronological order
Persisting over a protracted, recurring duration of time
temp
Primary Register: Literature, Law & Daily Prose
Living or occurring during the same historical era
Carried out or spoken on the spur of the moment with no preparation
Relating to worldly or sequential time as opposed to eternity
Greek "chron" generates scientific diagnostic and astronomical terminology, while Latin "temp" governs legal contracts, literature, and philosophical pacing.
From Elementary Foundations to High Honors
A continuous developmental sequence mapping exactly to reading comprehension benchmarks and standardized exam standards.
Anglo-Saxon & Early Latin
Focuses on essential prefixes, suffixes, compound words, and high-frequency Latin stems that establish foundational reading fluency.
Classical Latin Stems
Unlocks formal secondary school reading prose, analytical literature, and early standardized test stems across history and science.
Greek Forms & SAT Power
High-level compounding Greek stems and nuanced Latin hybrids that dominate top-percentile SAT Reading & Writing sections.
Built for ELA & Latin Teachers
Create classes in seconds with 6-character student join codes. Track real-time roster practice velocity, streak health, and inspect full mastery diagnostics for every learner.
Total Insight for Parents
Redeem your teacher-provided 8-character family code to connect with your child’s learning journey. Monitor retention health, explore the “Explain This Queue” algorithm inspector, and track SAT readiness progress.
Unlock the architectural foundation of English.
Join thousands of students and educators mastering vocabulary from the roots up. Free forever for independent learners.