Prefixes:
* Re-: Means "again" or "back" (e.g., re-sign a contract)
* Mis-: Means "wrongly" or "badly" (e.g., misinterpret a sign)
* Pre-: Means "before" or "in advance" (e.g., pre-sign a document)
* Co-: Means "together" or "jointly" (e.g., co-sign a loan)
* Counter-: Means "against" or "opposite" (e.g., countersign a document)
Suffixes:
* -age: Means "the act of" or "the state of" (e.g., signage)
* -er: Means "one who does" or "that which does" (e.g., signifier)
* -ing: Indicates an ongoing action (e.g., signing)
* -ed: Indicates a past action (e.g., signed)
* -able: Means "capable of" or "suitable for" (e.g., signable)
Note: Not all of these combinations are commonly used, and some may have specific meanings within a particular context.