per·ti·nac·i·ty 
(pûr′tn-ăsĭ-tē)
(pûr′tn-ăsĭ-tē)n.
The quality or state of being pertinacious: "Again and again ... with the inexorable pertinacity of a child ... did he renew his efforts" (Nathaniel Hawthorne).
- comprehensive
- comprehensively
- comprehensiveness
- compress
- compressed
- compressed air
- compressibility
- compressible
- compression
- compressional
- compression fracture
- compression ratio
- compression wave
- compressive
- compressively
- compressor
- comprisable
- comprise
- compromise
- compromiser
- compsognathus
- comp time
- Compton
- Compton
- Compton effect