Il entend à demi-mot = He can take a hint.
Ils se sont donné le mot = They have passed the word round; They have agreed before-hand what to say.
Tranchons le mot = In plain English; Not to mince matters; To put it plainly.
C’est mon dernier mot = That is the last concession I can make; I will not take less.
Il sait le fin mot de tout cela = He understands the upshot of all this.
Ne soufflez pas mot! = Do not breathe a word!
En deux mots = To cut a long story short.
Des mots longs d’une toise = Words as long as your arm.
[Racine, Plaideurs, i. 1.]