preocclusion

The insertion of a short stop before a sonorant, such as a [d] before an [n] or [l]The (phonological process, seen for example in Manx, of) insertion of a short stop before a sonorant, such as a [d] before an [n] or [l] (resulting in the preoccluded consonants [ᵈn] and [ᵈl]).