over·thin
ˌō-vər-ˈthin 
: excessively thin
overthin paint
She was … overthin, as if a hypercharged metabolism was burning off calories faster than she could stuff them into her mouth.—
Bonnie MacDougal
Bonnie MacDougal
overthinned; overthinning
: to make (something) too thin : to thin (something) too much
overthinning a tree with too much pruning
It is thinned with water just as the paints are, but care should be taken not to overthin and lose the quality of the gesso.—William F. Powell
William F. PowellCite this Entry
“Overthin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/overthin. Accessed 8 Jul. 2025.
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