Question

What rule applies most closely to this word?

avail-

Group I. If the root is a full word, the ending is usually -able.
Group II. When the root is a full word except for a final e, the forms usually are spelled with -able.
Group III. The suffix -able always follows i.
Group IV. When the root has other forms built on the letter a, the -able form is used.
Group V. When the root ends in hard c or hard g, -able is used.
Group VI. When the root is not a full word,-ible is used.
Group VII. When the word has an immediate -tion form, -ible is used.
Group VIII. When the root ends in ns, miss, or soft c or g, ible is used.

Answer 1

The rule that applies most closely to this word is

Group I. If the root is a full word, the ending is usually -able.

What is affix?

Affixes refer to words that are needed to add at the start of a word or at the end of a word which give it meaning.

Therefore, The rule that applies most closely to this word is

Group I. If the root is a full word, the ending is usually -able.

Learn more about affixes below

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