(CK):  Here's another word with strong force.  A Klingon might say it after receiving an unsettling communique.  It's a LOT stronger than the Terran "Darn it!" 

TREK TRIVIA:

When Picard failed to convince Klingon Governor Vagh that the Federation wasn't supplying weapons to Kriosian rebels, Vagh shouted: "You speak the lies of a *tah-keck*!"  Picard calmly leaned forward and replied, "*Qu'vatlh guy'cha b'aka!*"  Vagh complimented him, saying:  "You swear well, Picard.  You must have Klingon blood in your veins."  (TNG "The Mind's Eye"; spelling from captions)