Jastrow: פְּסִילּוֹס

פְּסִילּוֹס m. (ψελλός) one unable to pronounce certain letters, stammerer. Lev. R. s. 10, beg. והיו קורין אותו פ׳ and they called him (Amos) the stammerer; Yalk. Is. 307, v. עָמַס. Pesik. Naḥămu, p. 125ᵇ his name was Amos שהיה פ׳ בלשונו (not שהיו) because he hesitated in his speech.—Pl. פְּסִילִּים. Y. Ned. I, 37ᵃ top במקום שקוראין לנזיר נזיק … נזיר פ׳ וכ׳ in a place where people say naziḳ for nazir (owing to a dialectical peculiarity), I say so: shall a Nazarite among stammerers not be a Nazarite?; Y. Naz. I, beg. 51ᵃ