Learning Vocabulary 002

[Senior Presiden]

Base (n)The base is the lowest part, or the original part, of something.
The line BC is the base of the triangle ABC.
The base of the column is much thicker than the top.
Orientation is the base for students' later studies on the jebel.

The noun basis is similar in meaning to the noun base. The basis of something is its central and most important part, from which it has been developed or can be developed. [The plural of basis is bases]
There is no scientific basis for what they are saying.
He used that series of lectures as the basis for his new book.
On what basis did you make that decision?

To base is the verb. If you base one thing on another, you build it up from that thing.
Our ideas are based on a series of lectures we heard last year.
What was their decision based on?

The adjective is basic; basic means relating to the simplest and most important parts of something; it describes the thing on which everything else depends or is built.
Engineering students must take basic courses in chemistry, physics and math.
Isa has only a very basic understanding of math.
Addition, subtraction, multiplication and division are the four basic mathematical operations.
In Orientation, we cover all the basic points of English grammar.
People's most basic needs are food, clothing and a place to live.

The adverb from basic is basically.
I basically agree with what you have said but there are one or two very small points which I cannot accept.