How do you pronounce posture?
What is the meaning of posture?
Posture: The carriage of the body as a whole, the attitude of the body, or the position of the limbs (the arms and legs). “Postural” pertains to the posture or position.
Is the T silent in exactly?
In practice, yes it is virtually silent unless one makes a special effort to pronounce it. When we have a consonant cluster here /ktl/ one sound is often not heard. The linguistice term for it is “dissimilation”.