Adjectives denoting plurality

In today's post, I will discuss adjectives which denote plurality. Certain adjecitves such as 'cantik' (beautiful) can denote plurality when it is duplicated. For example, 'cantik-cantik' means 'all of them are beautiful'. When we are using duplicated adjectives, we must be carelly not to duplicate the nouns they describe or else the sentence will be incorrect.

Let us look at the mistakes made in this aspect.

1 Anak-anak Encik Lim tinggi-tinggi. [wrong]
Explanation: 'tinggi-tinggi 'means 'all of them are tall', Hence, 'anak' should not be duplicated. The correct sentence is 'Anak Encik Lim tinggi-tinggi'. [correct]
Of course, we can correct sentence 1 to:
Anak-anak Encik Lim tinggi. [correct]

2 Semua buku profesor itu tebal-tebal. [wrong]
Explantion: 'tebal-tebal' means 'all of them are thick'. Hence, 'semua buku' should not be used as it also convey the meaning of being plural. Just leave out 'semua' and the sentence is correct.
When you should have written is:
Buku profesor itu tebal-tebal. [correct] or
Semua buku profesor itu tebal. [correct]