The Dhatupatha (dhatupatha) is a lexicon of Sanskrit verbal roots subservient to the Ashtadhyayi grammar by Panini. It is organized by the ten present classes of Sanskrit, i.e. the roots are grouped by the form of their stem in the present tense.

The ten present classes of Sanskrit are:

1. bhūv-ādayaḥ (thematic presents)

2. ad-ādayaḥ (root presents)

3. ju-ho-ti-ādayaḥ (reduplicated presents)

4. div-ādayaḥ (ya thematic presents)

5. su-ādayaḥ (nu presents)

6. tuda--ādayaḥ (thematic presents)

7. rudh-ādayaḥ (n-infix presents)

8. tan--ādayaḥ (no presents)

9. krī-ādayaḥ (ni presents)

10. cur-ādayaḥ (aya presents, causatives)