"Look forward" Vs "Looking forward"

"Look forward" Vs "Looking forward"

The word "to" in this phrase may be confusing because it is usually used to introduce a verb, as in "want to", "have to", etc.

Even though saying "I want to hear from you" is completely correct, "to look forward to" employs a different pattern:

I look forward to (a thing you would like to happen)

Obviousely, "hear" is not a thing, so it wouldnt make much sense to "to look forward to hear from you". The thing you are looking forward to is "hearing from you":

I look forward to hearing from you   (correct)
I look forward to hear from you         (wrong)

As for the question wether to use:

"I look forward to" or "I am looking forward to"

Some people consider the two completely interchangeable, but most find the phrase with "look forward to" somewhat formal and best suited for formal cerrespondence, whereas "to be looking forward to" is more informal and friendly:

I look forward to hearing from you       (correct in formal writing)
I am looking forward to hearing from you     (correct in informal context).


Source: "Guide to Most Common Mistakes in English"

"Rest assured" Vs " Be rest assured"

"Rest assured" Vs " Be rest assured"

Simply put, "Rest Assured" is the correct thing to say.

You can say either "Rest assured" or "Be assured"

These are imperative verbs ( the same as the base or infinite form)

You can not say " Be rest assured" because then you are using two imperative verbs in succesion, which is ungrammatical.

"Rest assured"  > Meaning:
To be assured, to be cirtain that something will happen.

Examples:
(1)  please rest assured that we will do everything possible to help.
(2)  I know this fellow well, and you can rest assured he will give you good advice.
(3)  You can rest assured that your account will be credited tomorrow.



Sources: Oxford English Dictionary, Collins English Dictionary.

FETISH Vs FETISHISTIC

FETISH Vs FETISHISTIC

The first thing to NOTE is that the word "fetish" is a "Noun" and not an "adjective"

ERROR: The man is "fetish"

CORRECT: The man is "fetishistic"

CORRECT: The man is a "fetishist"

FETISH (Noun) >> Meaning:
1. Something, especially an inanimate object, that is believed to have magical powers.
2a. Any object that is involved in fetishism.
2b. A form of behaviour involving fetishism.
3. Any object, activity,etc, to which one is excessively devoted.

FETISHISM (Noun):
1. A condition in which the handling of an inanimate object or part of the body other than the sexual organ is a source of sexual satisfaction.
2. Belief in or recourse to a fetish for magical purposes.

FETISHIST (Noun): A person involved in fetishism.

FETISHISTIC (Adjective): giving to fetishism.


Source: Collins English Dictionary.