What dose doble consonants mean

Double consonants are words whose consonants are repeated. Here's an example: 'dropped.' The word "dropped" only has just 1 syllable, but the word has double consonant.

Double consonants are those English words whose consonants are repeated used and is successive. For example 'laddle', the double consonant here is the letter 'd'. Another example is 'dropped.' Though the word dropped has only one syllable, but the word has double consonant.