Determining English Dictionary Order

Ordering words in an English dictionary follows a strict alphabetical rule. We compare words character by character from the beginning. The word with the character appearing earlier in the alphabet at the first point of difference is placed first. If one word is a shorter version of another and forms its prefix (like 'cat' and 'catalog'), the shorter word comes first.

Analyzing the Given Words

Here are the words we need to order alphabetically:

• 1. Illustrate
• 2. Illustration
• 3. Illustrator
• 4. Illuminate
• 5. Illumination

Comparing Words Letter by Letter

Let's compare the words systematically:

Step 1: Initial Letters

All five words begin with the same sequence: "Illu".

Step 2: Fifth Letter Comparison

The fifth letter is where the first differences appear:

• Words 4 (Illuminate) and 5 (Illumination) have 'm'.
• Words 1 (Illustrate), 2 (Illustration), and 3 (Illustrator) have 's'.

Since the letter 'm' comes before 's' in the alphabet, the words starting with "Illum..." (4 and 5) will be listed before the words starting with "Illus..." (1, 2, and 3).

Step 3: Ordering the "Illum..." words (4 and 5)

Now, let's order 'Illuminate' (4) and 'Illumination' (5):

• Both share the prefix "Illumina".
• The next letter is 't' for both.
• Comparing the subsequent letters: 'e' in 'Illuminate' versus 'i' in 'Illumination'.

As 'e' comes before 'i', 'Illuminate' (4) is placed before 'Illumination' (5). So, the first two words in order are 4, 5.

Step 4: Ordering the "Illus..." words (1, 2, and 3)

Next, we order 'Illustrate' (1), 'Illustration' (2), and 'Illustrator' (3):

• All three share the prefix "Illustra".
• The next letter is 't' for all.
• Comparing the subsequent letters: 'e' in 'Illustrate' (1), 'i' in 'Illustration' (2), and 'i' in 'Illustrator' (3).

Since 'e' comes before 'i', 'Illustrate' (1) comes first in this group. The order so far is 4, 5, 1.

Step 5: Ordering the remaining "Illus..." words (2 and 3)

Now we compare 'Illustration' (2) and 'Illustrator' (3):

• Both share the prefix "Illustrati".
• The next letter is 'o' for both.
• Comparing the subsequent letters: 'n' in 'Illustration' (2) versus 'r' in 'Illustrator' (3).

Since 'n' comes before 'r', 'Illustration' (2) is placed before 'Illustrator' (3). The order for this group is 1, 2, 3.

Final Dictionary Order

By combining the ordered segments, the complete correct dictionary order of the word numbers is:

4, 5, 1, 2, 3

This sequence represents the words in the following alphabetical order:

Illuminate, Illumination, Illustrate, Illustration, Illustrator.