Drop
/drˈɑp/
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Definition
(noun) A small quantity of liquid, just large enough to hold its own rounded shape through surface tension, especially one that falls from a source of liquid.
Sentence Examples
Since you like to write letters, why don't you drop her a line?
I wish you could drop in at my house on your way home.
CEFR Practice Quiz
Since you like to write letters, why don't you ____ her a line?