IPA: /ˈrʌniɪst/
KK: /ˈrʌniɪst/
The most liquid or watery in consistency, often used to describe something that flows easily.
The soup was the runniest I've ever seen, spilling all over the table.
Comparative: runnier
Superlative: runniest
'runny' (from Old English 'rynig', meaning liquid or flowing) and '-est' (a superlative suffix indicating the highest degree). The word 'runniest' describes something that has the highest degree of being liquid or flowing.
Think of 'runny' meaning something that flows easily, and '-est' shows it's the most of that quality — so 'runniest' means the most liquid.