What does the Italian expression "A riguardar" mean in English?

The main problem of the translation is that the Italian version ir rather obscure!

The original verses are in neapolitan and say "E nun te corre appriesso e nun te struje,sulo a guardá."

Your translation is good "and it doesn't chase you and doesn't destroy you..if you only look at it!"

Here are the initial verses:

"Aisséra, Nanninè', mme ne sagliette,tu saje addó'.Tu saje addó'! " Yesterday night, sweet Anne, I climed up, you know where!"

Addó', 'sto core 'ngrato, cchiù dispiette, farme nun pò. Farme nun pò! " where your ungrateful heart cannot harass me"

Addó' lo ffuoco coce, ma si fuje, te lassa stá. Te lassa stá!" Where the fire burns but if you ran away it lets you go"

E nun te corre appriesso e nun te struje,sulo a guardá. Sulo a guardá!

"and it doesn't chase you and consumes you if you only look at it."

It's the lament of a lover who tries to run away from the ungrateful lady he adores. He climes up the Vesuvio (the occasion of the song is the new built "funicolare").

there are many versions of the song; fine Pavarotti's one.

to cover, which in the song would mean it doesnt chase you and doesnt destroy you, it covers you