Dissimilation.—a. λ sometimes becomes ρ when λ appears in the same word: ἀργαλέος
b. A consonant (usually ρ) sometimes disappears when it occurs also in the adjoining syllable: δρύφακτος
c. Syllabic dissimilation or syncope occurs when the same or two similar syllables containing the same consonant succeed each other: ἀμφορεύς
d. See also under 99, 125 a, b.
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].