word-detective.com

R54jQ TIL that when Hamlet talks about knowing “a hawk from a handsaw,” he wasn’t referring to the tool but a bird (handsaw was originally “heronshaw,” an old form of “heron.”)
VMvA8 TIL the root of the word "ruthless" the the verb "to rue" meaning “to feel sorrow or regret”
GYvlQ TIL the phrase ‘Drop you a Line’ refers to a sending very short letter: a row of written text is the the singular ‘line’, delivered through a letter ‘dropped’ in a mailbox