ξίρις
From LSJ
ἀξιοπιστόστερα εἰσί τραύματα φίλου ἢ ἐκούσια φιλήματα ἐχθροῦ → faithful are the wounds of a friend; but the kisses of an enemy are deceitful
Frisk Etymological English
Grammatical information: f.
Meaning: Iris foetidissima (Thphr.)
Other forms: Also ξιρίς (Dsc. 4, 22); and σῖρις or σίρις (EM. 209, 35). ξυρίς (Dsc., Plin. Gal.); ξειρίς (Ar., Hesych.).
Origin: PG [a word of Pre-Greek origin]
Etymology: Frisk doubts (s.v. ξυρ-) which is the original form (ξιρ- or ξυρ-); DELG thinks that ξυρ- could be due to folketymology (referring to Stömberg, Pflanzennamen 44); the form σιρις suggests that ξιρ- is the oldest form. The variants point to Pre-Greek.