Building Compounds
The best way to understand Tonesu is to watch a word get built. Each example below starts from a concept, works through the root selection, and arrives at a compound — showing why that particular structure was chosen.
Example 1: scholar
Concept: a person whose defining role is knowledge
Available roots:
- to — conceptual pattern, knowledge, thought
- li — social agent, person
Structure: to + li — a person characterised by knowledge
to-li → knower, scholar
Head-final rule: li (person) is the head; to narrows it to the knowledge domain.
Nothing wasted, nothing ambiguous.
Example 2: computer
Concept: a device that processes knowledge
Available roots:
- to — knowledge, conceptual pattern
- ki — change, process, motion
- mu — device, artifact
Building up:
to-ki = knowledge + change → the process of transforming knowledge
to-ki-mu = to-ki + device → a device that performs to-ki → computer, calculator
Derivational suffix -mu (device) attaches after the semantic core. Stacking order: root → semantic modifier → role suffix.
Example 3: engine
Concept: a device that converts energy into motion
Available roots:
- ra — energy, force
- ki — motion, change
- mu — device
ra-ki-mu = ra (energy) + ki (change) + mu (device) → energy-change device → engine, motor, generator
The same pattern as to-ki-mu — semantic core first, role suffix last. The head tells you what kind of thing it is; the left roots tell you what domain it operates in.
Example 4: shrine / temple
Concept: a place defined by structured intentional practice — rituals, acts of will, organized form
Available roots:
- pa — place, space
- wi — will, intention, goal
- ka — intentional action
- su — structure, organized form
First pass:
pa-wi-ka-su → right-branching: pa modifies {wi modifies {ka-su}} → place of will modifying structured-action
That reads as: a place-of-will organized-action-structure. Close, but pa-wi (destination place) is a unit — we want [pa-wi] (the destination) to be the head that [ka-su] (structured practice) describes.
With ':
pa-wi'ka-su = [pa-wi] + [ka-su] → destination-place of structured-intentional-practice → shrine, temple
The apostrophe binds pa-wi first, then the full compound combines. This is a case where ' is required for the intended reading, not merely helpful — without it the parse lands in the wrong place.
Example 5: deliberate removal of fault (forgiveness)
Concept: the intentional act of cancelling out a moral failing
Available roots:
- ka — intentional action
- no — negation, removal, absence
- de — decay, decrease, breakdown
- su — structure, organized system
Building the fault first:
de-su = decay + structure → fault, moral failing (a degradation of order)
Then adding deliberate removal:
ka-no-de-su = ka (deliberate) + no (removal) + de-su (fault) → deliberate un-faulting → forgiveness
Left-to-right: ka marks the act as intentional; no negates/removes; de-su is what gets removed. The full compound is compositionally transparent — a reader who knows the roots can arrive at the meaning without a dictionary.
What makes a good compound?
Root economy — use the minimum roots that achieve the target meaning without ambiguity.
Head clarity — the rightmost root should be the strongest semantic anchor for the class of thing being named.
Operator consistency — if you use no-, ka-, or re- as a left-slot modifier, it applies to everything to its right. Make sure that scope is intentional.
Stability across contexts — a good compound reads the same way whether it appears alone or embedded in a longer sentence.
When a compound needs restructuring to be clear, the first tool is '. If ' alone is insufficient, the concept probably wants to be a multi-word phrase rather than a single compound.
For the full rules on right-branching, ' juncture, and derivational suffixes, see Building words.
Sentence walkthroughs
The worked examples above show how individual words are built. The walkthroughs below show the grammar working in full sentences — parse breakdowns that reveal how slots, particles, and compounds interact.
For the complete corpus (575+ sentences), see the Corpus.
S001 — Basic agent-action-patient
The person builds the object.| Element | Parse |
|---|---|
la-li |
agent: person |
ka-be |
action: growth/construction |
lo-mu |
patient: artifact |
S017 — Purpose clause
She sent the message to warn them.| Element | Parse |
|---|---|
la-ze |
agent: she / they (3rd person) |
lo-si |
patient: the signal / message |
ka-sikipast |
action: transmitted (past) — si-ki = signal-motion |
wi [...] |
purpose frame: in order to... |
ka-fesi ne-yu |
warn (fe-si = boundary-signal) them |
The wi frame introduces a purpose clause. The [...] brackets are an aside — they could be omitted and the core sentence would still be grammatical.
S018 — Studying to comprehend
They study in order to comprehend.to-ki= knowledge-change = the process of reasoning, studyingto-su-ki= entering a state of organised knowledge = comprehension (the threshold moment)- The distinction:
to-kiis the ongoing activity;to-su-kiis the moment it crosses into understanding
S033 — Contingent state
The room is warm.lo- places pa (room) in the patient slot — a contingent current state. The room is warm right now; it could cool down. Compare with the intrinsic property form:
Same words, different claim. See Grammar for the full la-X / lo-X distinction.