Common Words:
* Sign: A mark or symbol that represents something else.
* Signature: A person's name written in their own handwriting.
* Signal: A sign or action that conveys information.
* Design: A plan or drawing that specifies the form of something.
* Assign: To give someone a task or responsibility.
* Resign: To give up a position or office.
* Consign: To give something over to someone's care or custody.
* Designation: The act of naming or identifying something.
* Significant: Important or meaningful.
Less Common Words:
* Insinuation: A suggestion of something bad or unpleasant.
* Insignia: A badge or mark of office or membership.
* Signify: To mean or represent something.
* Assignation: A secret meeting, especially for a romantic encounter.
* Designable: Capable of being designed.
Prefixes:
* Signa-: A prefix meaning "mark" or "sign." For example, signatory (a person who signs a document).
Note: The root "sign" can also be combined with other roots to form new words, such as signature (sign + graph), signal (sign + -al), and design (de + sign).
This is not an exhaustive list, but it gives you a good starting point for exploring words with the Latin root "sign."