Editing Syllable (section)

====Onset cluster====
Some languages restrict onsets to be only a single consonant, while others allow multiconsonant onsets according to various rules. For example, in English, onsets such as ''pr-'', ''pl-'' and ''tr-'' are possible but ''tl-'' is not, and ''sk-'' is possible but ''ks-'' is not. In [[Greek language|Greek]], however, both ''ks-'' and ''tl-'' are possible onsets, while contrarily in [[Classical Arabic]] no multiconsonant onsets are allowed at all.

Onset clusters often follow the [[sonority principle]], that is, onsets with increasing sonority (/kl/) are usually preferred to ones with a plateau (/ll/) and even stronger preferred to decreasing sonority (/lk/); however, many languages have counterexamples to this tendency.{{sfn|Easterday|2019|p=9}}