Etymology or cognates for ἀνιαρός?

Greek Learning Greek
1

Is there a ready etymology or any cognates for ἀνιαρός?

This question arise while reading τήνδ᾽ ἔτι λύπην ἀνιαροτάτην (Eur.Med.1113)

My first thoughts are “unhealable” or “which can’t be gotten through”, but I’m not convinced by them.

2

http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3Da)nia%2Fw

3

If the -ία in ἀνία is just part of the morphology of the noun, then ἀν may be onomatopeic - a sigh.

4

On a side note:
The etymology of the toponym Βηθανία as a Aramaic-Greek hybrid בית-ἀνία, after the same model of Aramaic-Greek hybrid as Βαρτιμαῖος, viz. בר-Τίμαιος, seems plausible, without trying too hard to get other explanations from other languages for -ανία.