How do I make this database?

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C#

If you have ever downloaded "pleco", that is what i want to program. But, i want to make a multi language version. I want to add Japanese and Korean. I want the same features like the dictionary tab, have it divide the characters to show individual meanings, words that contain that character, and example sentences. I also want to add a synonym and antonym tab.

But I don't know how to go about making the database to store every character and synonyms, sentences, etc.

What I have tried:

I have searched online and came across this type of dictionary:

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class StudentName
{
public string FirstName { get; set; }
public string LastName { get; set; }
public int ID { get; set; }
}

class CollInit
{
Dictionary<int, StudentName> students = new Dictionary<int, StudentName>()
{
{ 111, new StudentName {FirstName="Sachin", LastName="Karnik", ID=211}},
{ 112, new StudentName {FirstName="Dina", LastName="Salimzianova", ID=317}},
{ 113, new StudentName {FirstName="Andy", LastName="Ruth", ID=198}}
};
}

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however, this doesn't seem to fit my need for matching language word translations, sentences, etc.

(This is going to be programmed for android)

for example,

挺：very；to straighten
蛮：very
好：good

蛮好看啊！very good！(蛮 and 好 both link to this sentence)
but 挺 蛮 link as synonyms.

and how would i link 挺to the two meanings?
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please show me visual code for how to link them and store them in c#