Georg Autenrieth, A Homeric Dictionary

πέρ : enclitic particle, giving emphasis or prominence to an idea, usually to what immediately precedes it, very, at least, even, just, etc. ἐπεί μ᾽ ἔτεκές γε μινυνθάδιόν περ ἐόντα, ‘for a very short life,’ Il. 1.352, 416, Il. 3.201; here belongs the use with participles denoting opposition (concession), so καίπερ, where πέρ itself of course does not mean ‘although,’ but the logical relation of the part. is emphasized, οὔ τι δυνήσεαι ἀχνύμενός περ | χραισμεῖν, ‘however distressed,’ ‘distressed tho’ you be,’ i. e. though very distressed, Il. 1.241 . πέρ is freq. appended to other particles, conditional, temporal, etc., and to all relative words, ὡς ἔσεταί περ (ὥσπερ), ‘just as,’ Od. 19.312 ; ἔνθα περ, εἴ περ, ‘that is if’; ἐπεί περ, see ὅσπερ.