What rule applies most closely to this word?
Exhaust-

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.

Respuesta :

Group VII. 

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The rule that applies most closely to this word

Exhaust is Group VII when the word has an immediate -tion form, -ible is used

What is prefix?

A prefix are usually attached to the beginning of a word and suffix are added to the at the root of a particular word. The can give new meaning to a particular word.

The word exhaust can carry the prefix ion and ible

Therefore, the rule that applies most closely to this word Exhaust is Group VII when the word has an immediate -tion form, -ible is used

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