The most transparent, easy to understand, or obvious out of all possibilities.
From Old English 'clær,' related to Latin 'clarus' meaning 'bright' or 'clear.' The superlative suffix '-est' was added to create the highest form of comparison.
The word 'clear' is linguistically related to 'clarus' in Latin and 'clerk'—people who were educated and could 'clear up' confusion were highly valued in medieval times.
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