anānexa
best or most. This is an attribute rather than a comparative, so maybe a better translation is “acme” or “epitome”, i.e. this word describes something that is the best of a group or has the most of a quality in the group.
In the North Wind and the Sun this word always modifies the preceding word antāken to make the noun phrase antāken anānexa “the strongest”, or “the most strength”.