Masculine a-stem Nouns
This is Pāli's largest noun class by far — most masculine nouns you will ever meet decline this way, and neuter nouns follow nearly the same pattern with small, learnable adjustments covered later. Master this one paradigm and you can already read a large share of ordinary Pāli prose.
The Model Word: buddha
An "a-stem" noun is simply one whose dictionary form ends in the short vowel -a. We'll decline buddha — "the awakened one" — throughout, in both numbers, across all eight cases from Lesson 5. Each row below gives the primary, most frequent ending first; a secondary ending you'll also meet in real texts follows in small italics.
| Case | Singular | Plural |
|---|---|---|
| Nominative | buddho | buddhā |
| Accusative | buddhaṃ | buddhe |
| Instrumental | buddhena | buddhehialso buddhebhi |
| Dative | buddhassaalso buddhāya | buddhānaṃ |
| Ablative | buddhāalso buddhasmā, buddhamhā | buddhehialso buddhebhi |
| Genitive | buddhassa | buddhānaṃ |
| Locative | buddhealso buddhasmiṃ, buddhamhi | buddhesu |
| Vocative | buddha | buddhā |
The Paradigm Is Smaller Than It Looks
Sixteen slots (eight cases × two numbers), but nowhere near sixteen distinct forms, because Pāli reuses the same ending across several cases wherever no ambiguity results. Three patterns are worth fixing in memory as rules, not sixteen separate facts:
- Dative = Genitive, in both numbers. Singular buddhassa serves as both "to/for the Buddha" and "of the Buddha"; plural buddhānaṃ does the same job for both meanings. Context — usually just what makes sense in the sentence — tells you which is meant.
- Instrumental = Ablative, in the plural. buddhehi means both "by the Buddhas" and "from the Buddhas."
- Nominative plural and Ablative singular collide. buddhā is genuinely ambiguous out of context — it could be "the Buddhas" (many, doing the action) or "from the Buddha" (one, as a source). Real sentences almost always disambiguate this through the verb or surrounding words, but it's worth knowing the collision exists rather than assuming a mistake when you meet it.
The dative -āya alternate is not a rare curiosity — it survives in one of the most famous stock phrases in the entire Canon, the missionary charge to go forth "for the welfare of the many, for the happiness of the many": bahujanahitāya bahujanasukhāya. Both hitāya and sukhāya are ordinary a-stem nouns (hita, "welfare"; sukha, "happiness") in exactly this alternate dative singular. Once you notice this ending, you'll find it constantly in exactly this kind of purpose-clause.
Confirming Lesson 4's Preview
Now the payoff from Lessons 4 and 5: sammāsambuddhassa in Namo tassa... sammāsambuddhassa is built on exactly this paradigm. Strip the compound down to its final member, sambuddha — an a-stem noun, declining exactly like buddha — and add the dative/genitive singular ending this lesson just gave you: sambuddha + -ssa = sambuddhassa, "to/of the Perfectly Awakened One." What looked like an isolated fact in Lesson 4 is now a predictable output of a rule you can apply to any a-stem noun.
the teaching, the truth, a phenomenon — declines exactly like buddha: dhammo, dhammaṃ, dhammena...
the path, as in the Noble Eightfold Path (ariyo aṭṭhaṅgiko maggo — notice maggo, the a-stem nominative singular, agreeing with ariyo)
the community — saṅgho, saṅghaṃ, saṅghena...
Practice: Producing the Form
Using the paradigm above, give the correct form of buddha for each context.
- "___ dhammaṃ deseti" — the Buddha teaches the Dhamma. (subject)
- "___ passati" — she sees the Buddha. (direct object)
- "___ vandāmi" — I pay homage to the Buddha. (recipient)
- "idaṃ ___ sāsanaṃ" — this is the Buddha's teaching. (possession)
- "___ desito ayaṃ dhammo" — this Dhamma was taught by the Buddha. (means/agent)
Check your answers
1. Buddho — nominative singular.
2. Buddhaṃ — accusative singular.
3. Buddhassa — dative singular.
4. Buddhassa — genitive singular (identical to the dative — this is the syncretism from earlier in this lesson).
5. Buddhena — instrumental singular.
Continuing From Here
Lesson 7 gives the feminine counterpart to this lesson: nouns ending in long -ā, declined here with paññā, "wisdom." Its singular paradigm holds a surprise — five of the eight cases share a single ending.