While it might seem strange to call a vowel a consonant, in this case, we're referring to the silent "e" at the end of many words. It often serves to indicate that the preceding vowel should be pronounced long, as in "make", "hope", or "time".
Let's clarify with some examples:
* "Make": The "e" is silent, but it makes the "a" sound long.
* "Hope": The "e" is silent, but it makes the "o" sound long.
* "Time": The "e" is silent, but it makes the "i" sound long.
While there are other silent consonants like "k" in "knife" or "b" in "debt," the silent "e" is far more common and prevalent in English vocabulary.