unerring (adj.)

• close
• constant
• delicate
• direct
• even
• exact
• express
• faithful
• fine
• incorrupt
• incorrupted
• inerrable
• inerrant
• infallible
• mathematical
• microscopic
• nice
• precise
• refined
• religious
• rigid
• rigorous
• scientific
• severe
• sinless
• square
• strict
• subtle
• sure
• uncorrupted
• undeviating