It is unclear if Kan., Tulu mōṇṭu have to be traced to a separate root
*mōṇṭ-; if so, Tamil forms like moṭṭai, moṇṇai should probably
be considered as descended from roots with weak clusters.
Cf. also the following forms: Ta. moṇṭu refractoriness, unruliness,
annoyance, worry; moṇṭi, moṇṭukkāran_ refractory man; Kannada
moṇḍu, moṇḍutana stupid obstinacy, esp. in demanding or dunning.
These forms are joined by B&E with *mur- 'rough, rude', but this is hardly possible.