There are three types of Japanese characters, one of which is Kkanji.

また、

There are three types of Japanese syllabaries, one of which is kanji.

It was originally derived from Chinese characters, but the style has transformed over thousands of years.

I'm not sure how many wordskanji exists in this world, but at least 2,000 words are required to learn at amust be memorized in Japanese schools.

It takes several years to learn basic variations even if it is athe mother tongue.

People who use alphabets may have similar difficulties when they memorize confusingwords which are difficult to spells.

However, iIt is still possible, however, to read and type for looking upthem to look them oup in a dictionary even if the meaning of the words areis unknown.

"... meaning ... is unknown"→ since "meaning" is singular, it requires a singular verb.

また、

It is still possible, however, to read and type them to look them up in a dictionary even if the meanings of the words are unknown.

When we come across the unknown kanji, it is really difficult to know thewhat it meanings.

At that timeWhen this happens, we try to take apart theits structure and tell theguess the meaning from its pieces.

For example, 踝 consists of 足 and 果, so I ask people how to read it or what is the meaning of the wordthey think it means if the kanji is composed of legs（足） and the "ka" sound of fruits（果実）.

Then, we could findan guess that 踝 means ankle.

初めて聞きました。

Most Japanese wouldn't know 踝what 踝 means, so we usually describe ankle as くるぶし in Hhiragana.

Hiragana and Kkatakana are the rest ofmaining Japanese charactersyllabaries, by which we express difficult kanji and foreign words.

We musttend to forget anything not used ion daily livea regular basis.

また、

We tend to forget anything which is not used on a regular basis.

I believe that people in olden times had much larger vocabularyies than inwe do today.

It is a pity that we can't read books from olden times without annotation.

It was originally derived from Chinese characters, but the style has transformed over thousands of years.

I'm not sure how many words exists in this world, but learning at least 2,000 words are required to learn atis required in a Japanese school.

It takes several years to learn basic variations even if it is ayour mother tongue.

People who use alphabets may have similar difficulties when they memorize confusing spells.

Could you try to rephrase this sentence?

When we come across the unknown kanji, it is really difficult to know the meaning.

AtWhen that timehappens, we try to take apart the structure and tellfind the pieces.

Most Japanese people wouldn't know 踝, so we usually describe ankle as くるぶし in Hiragana.

Usually groups of people of certain nationalities are either referred to like "Japanese people" or "the Japanese". If the plural of the nationality ends with an s, one could also simply say "Americans" or "Russians", for example.

Hiragana and Katakana are the rest of the Japanese characters, bywith which we express difficult kanji and foreign words.

As time goes by, people have less opportunities to write somethings by hand.

We must forget anything not used in our daily lives.

I believe that people in old times had a much larger vocabulary than inwe do today.