שָׁגַג
From LSJ
Ἐλεεινότατόν μοι φαίνετ' ἀτυχία φίλου → Miseria amici mihi suprema est miseria → Am meisten Mitleid, scheint's, heischt eines Freundes Leid
English (Strong)
a primitive root; to stray, i.e. (figuratively) sin (with more or less apology): X also for that, deceived, err, go astray, sin ignorantly.