What is the meaning of brevity?
Brief most often used as an adjective for means lasting a short period of time. Adverbial form of the adjective brief briefly, which most often means for a short period of time or briefly. As a noun, the word brief usually means a short written element.
The letter T is definitely silent?
In practice yes, in practice quiet if someone does not make much effort to pronounce it. When we have a consonant cluster here /ktl/, one sound is often not heard. The linguistic term for this is “dissimilation”.
What is the correct pronunciation?
Pronunciation the way a word or language is pronounced. It may refer to the generally accepted sequences of sounds used when pronouncing a given word or language in a particular dialect (“correct pronunciation“) or simply how a particular person pronounces a word or language.