Eng-Thai Lexitron Dict : unconquerable, 7 found, display 1-7  
 
 
 
 
 
 
 - impregnable-  :  (ADJ)-  ;  ที่ไม่สามารถเอาชนะได้-  ;  Syn:unbeatale, unconuerable-  ;  Ant:beatable, conquerable
 
Thai-Eng Lexitron Dict : unconquerable, not found  
Royal Institute Thai-Thai Dict : unconquerable, not found  
Budhism Thai-Thai Dict : unconquerable, not found  
ETipitaka Pali-Thai Dict : unconquerable, not found  
Pramaha Prasert Mantasevi's Thai-Pali Dict : unconquerable, not found