There are three syllables in the word pretending.
It can be, rarely, as in a knowing look. (one that implies understanding)Knowing is the present participle of the verb to know, and may be a verb, an adjective, or a noun (gerund).
Age and language are not mutually exclusive. Knowing when to use a vulgar or mundane word is a matter of knowledge. If you don't know if it is allowed then don't use it. A word such as crap might be best saved when those within ear shot know without a don't your intent.
The word "omniscient" describes a state of knowing everything or having universal knowledge. It is often used in literary contexts, particularly to refer to a narrator who possesses complete understanding of all characters and events in a story. Another term is "all-knowing," which conveys a similar meaning.
intuition
Ignorance is the word that means not knowing about something that you should know.
There are three syllables in the word pretending.
They were going to pretend to be businessmen.
pretending, make-believe
If you are sure he is pretending to like you then don't give him the satisfaction of knowing he won you over.
Knowing is the present participle of the verb know.
Know = to be aware of something
The term for knowing a word's part of speech in order to appropriately use it in a sentence is "word-usage."
The word know is a noun as well as a verb; to be in the know (informed, aware). Noun forms for the verb to know are knower, one who knows, and the gerund knowing. The word "know" is a verb. The related word "knowledge", meaning "that which is known", is a noun.
pretending
it helps the reader know how to use the word in a sentence
The word know is already a verb because it is an action.Other verbs are knows, knowing and knew.Some examples are:"I know who you are"."She knows where it is"."I like knowing you"."I knew it was there".