What is the meaning of -am?

Postconsonantal form of -əm after the vowels A / I / O / U.

indicates a collectivity

suffix for correlatives of time

my (first-person singular, single possession)

Added to a noun or a verb to form a noun. A final single -l may become long -ll-.

accusative feminine singular of -us

accusative singular of -a

first-person singular present active subjunctive of

A suffix that acts as transitive inanimate verb (vti) class marker

broad form of -em

Oblique plural suffix (with a-declension nouns)

Instrumental suffix (with a-declension nouns)

a suffix indicating the third-person plural present indicative of -ar

first-person singular imperative ending of verbs

Used to form a verbal noun.

Source: wiktionary.org