Proverb completion – meaning & usage: supply the missing word in the well-known aphorism. Base sentence: "To err is _____; to forgive, divine." Context: Standard moral proverb contrasting human fallibility with divine forgiveness. Final instruction: Choose the word that correctly completes the first clause.

Given data

• Complete: "To err is _____; to forgive, divine."

Concept/Approach
The proverb is: "To err is human; to forgive, divine." It states that making mistakes is characteristic of humans, while forgiveness reflects a godlike virtue.

Option analysis
human — the canonical word used in the proverb. ✅natural — too generic; the set phrase is not this. ❌inhuman — means cruel; opposite of intent. ❌beastly — informal/derogatory; incorrect. ❌

Usage note
Punctuation commonly uses a semicolon before "to forgive, divine".

Final Answer
human