Italian has geminate, or double, consonants, which are distinguished by length.
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Unlike most other Western Romance languages, Catalan has phonemic geminate consonants.
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In a geminate or long consonant, the occlusion lasts longer than in simple consonants.
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A word ending in a geminate stop must compulsorily add the predictable vowel at the end.
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Usually a trill vibrates for 2-3 periods, but may be up to 5, or even more if geminate.
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Italian has geminate, or double, consonants, which are distinguished by length and intensity.
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Words do not normally end in a geminate stop except in some adjectives ending in a consonant.
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Geminate plosives and affricates are realised as lengthened closures.
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Geminate consonants are phonemically contrastive in Biblical Hebrew.
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More examples
Reduplicate: form by reduplication; "The consonant reduplicates after a short vowel"; "The morpheme can be reduplicated to emphasize the meaning of the word"
A doubled or long consonant; "the `n' in `thinness' is a geminate"
Pair: occur in pairs
Arrange or combine in pairs; "The consonants are geminated in these words"
(gemination) the doubling of a word or phrase (as for rhetorical effect)
(Geminates) In phonetics, gemination happens when a spoken consonant is pronounced for an audibly longer period of time than a short consonant.
(Gemination (dentistry)) The phenomenon of gemination arises when two teeth develop from one tooth bud and, as a result, the patient has an extra tooth, in contrast to fusion, where the patient would appear to be missing one tooth. ...
(geminated) Lengthened (said of consonants), or doubled. Geminated consonants are unknown in English, but appear in many other languages, like Italian (written as double consonants: pizza, otto, Massimo, doppo).
(Gemination) A single tooth bud that divides and forms two teeth.