jiàn zhěn
check-up (health, car safety, environment etc)
jiǎn zhèn
shock absorption
vibration dampening
jiān zhēn
firm
unswerving
loyal to the end
Jiàn zhēn
Jianzhen or Ganjin (688-763), Tang dynastic Buddhist monk, who crossed to Japan after several unsuccessful attempts, influential in Japanese Buddhism
jiān zhèn
confirmation (Christian ceremony)