Semitic root

Semitic Root languages are characterized as a sequence of consonants or "radicals". 
Triconsonantal roots.
A triliteral or triconsonantal root (Hebrew: שרש תלת-עצורי‎, "šoreš təlat-ʻiṣuri"; Arabic: جذر ثلاثي‎, "jiḏr ṯulāṯī"; Syriac: ܫܪܫܐ‎, "šeršā") is a root containing a sequence of three consonants.