Abstract : Asian languages reveal a continuum from quasi-disyllables to highly eroded monosyllables. These variegated states are now understood to be different stages along a common evolutionary path. An overview is proposed, beginning with the earliest stages of monosyllabicization, before the generalization of a strictly monosyllabic phonological structure. The well-documented processes of consonantal depletion which lead to the development of phonation-type registers and tones are set out within a general model. Lastly, phonological evolutions observed at advanced stages of segmental depletion are discussed. The concluding note concerns the aftermath of segmental depletion: the re-creation of polysyllables.