PRN
unecessary
I don't believe that there is an abbreviation for Chicago.
RES is the abbreviation for resource. A resource is a source of supply, support, or aid, especially one that can be readily drawn upon when needed.
Warranted means needed or necessary.
The correct spelling is necessary (needed, required).
unecessary
Boston is a city, and does not really have an abbreviation. However, for it could possibly be written as "Bos" if an abbreviation is needed.
In medicine, the abbreviation PRN is used. It is from Latin "pro re nata" meaning for an occasion that has arisen, as circumstances require, as needed.
The Spanish word for March is "Marzo". Most places do not abbreviate it because it is such a short word, but when abbreviation is necessary, the term "Mar." can be used. It is usually not used though because the word "mar" is Spanish for sea, and therefore most people just write out Marzo whenever they use it.
It is ft. Lineal is not necessary.
The abbreviation of "legendary" is often represented as "legend." However, in contexts where an abbreviation is specifically needed, it may also be shortened to "leg."
whenever the president determines that its necessary
whenever
No
There is no standard abbreviation in English for "cousins," because the word is so short that no abbreviation is usually needed.
Reverend is commonly abbreviated as Revd and Rev. (the period/full stop is necessary in the latter abbreviation)
The medical abbreviation for "every 4 hours as needed" is "q4h prn." Here, "q" stands for "every," "4h" indicates the interval of four hours, and "prn" means "as needed." This abbreviation is commonly used in medical prescriptions and notes to guide dosing schedules.