This is the 271st most frequent Tamil word.
எர
"எர" (Era) in Tamil means "to burn" or "to blaze."
Here, 'எர' is part of the verb 'எரியும்', meaning 'burning', indicating combustion.
அது எரியும் தீ.
That is a burning fire.
Here, 'எரி' (from 'எர') is used as a noun meaning 'fuel' or 'that which burns'.
மணலில் எரிவிரிக்க எரிகள் தேவை.
For a campfire in the sand, we need fuels.
Here, 'எரியும்' is derived from 'எர', representing 'burning', describing the state of the lamp.