rem acu tango

Etymology
From the accusative of  +, the ablative of  +. Literally meaning "I touch the issue with a needle", "I touch the matter with a needle", or "I touch it with a needle".

Verb

 * 1)  to hit the nail on the head

Usage notes

 * Usually used in the active perfect second person singular form, the word rem is sometimes omitted as in . It is also used in the third person;.