What is the meaning of -g?

Contraction of og, after words ending in vowels.

Alternative form of ge

A suffix denoting the plural of an animate noun

A suffix denoting the proximate conjunct form of an inanimate intransitive verb (vii)

A suffix denoting the second-person plural imperative of an animate intransitive verb (vai)

A suffix denoting the third-person singular conjunct form of an animate intransitive verb (vai) with a nasal ending

A suffix denoting the second-person plural to singular or plural object imperative of a Type 3 transitive inanimate verb (vti3)

A suffix denoting the third-person singular to first-person singular or second-person singular form of a transitive animate verb (vta) with an -aw or Cw ending

Added to a stem - often an onomatopoeia - to form a verb expressing a (quickly) repeating or continuous action.

Added to a verb or a noun to form a noun or an adjective.

Source: wiktionary.org