Other forms: spoonfuls
A spoonful is as much as a spoon will hold. A spoonful of sugar, two spoonfuls, a heaped spoonful.
The plural is spoonfuls, not spoonsful, and the same goes for cupfuls and handfuls. In recipes it is imprecise unless the spoon is named — a teaspoon and a tablespoon differ threefold, and American and British tablespoons differ again.
1nounspoonfulAs much as a spoon will hold.
“She stirred a spoonful of honey into her tea.”
spoonful is a measure.
Spoon plus -ful. Spoon is Old English spon, which first meant a chip or splinter of wood.
Middle English
sponeful
English, today
spoonful
From Middle English sponeful, sponefull, sponful, spone-ful, equivalent to spoon + ful.
Etymology from Wiktionary, CC BY-SA