I understood most of it.

I Pronoun

— The person who is speaking or writing I am writing this, and you are reading it.

I Noun

— The ninth letter or the alphabet; previous H, next J. I is a vowel.

I Symbol

— A symbol meaning first, as in "George I" (which is said as "George the first"). — The symbol for iodine on the periodic table of elements. — The symbol for electrical current.

I Number

— This is the roman numeral for one (1). It may be written as I or i.

i Noun

— The ninth letter or the alphabet; previous H, next J. I is a vowel.

understood

— adjective fully apprehended as to purport or meaning or explanation the understood conditions of troop withdrawal were clear — adjective (= silent, tacit) implied by or inferred from actions or statements gave silent consent a tacit agreement the understood provisos of a custody agreement

most Determiner

— The majority of; much of; > 50%. She does the most cleaning, but the least cooking. — The largest amount of. Bob knows the most about cooking.

most Adverb

— Having the largest amount of a characteristic in a group. You must ask yourself what is most important. Tony is the most successful. — To a large degree; very. That is most unusual.

of Preposition

— Made using. It is a house of cards.

it Pronoun

— used to refer to an object without identifying or describing it; the object might have been described earlier in the text. The house was very big. It had many rooms. — used to describe the weather It is very hot today. I'm staying in because it is raining — used to describe a situation in general I don't like it when people tell me to do something. It is hard to find a job.

it Abbreviation

— It can be a short way of writing: — # Italy or Italian — # Information Technology, the use of computers