irreplaceable /ir-i-plāˈsə-bl/

1. Whose loss cannot be made good
2. Without possible substitute

irreplaceˈably adverb

• pass laws
• passless
• passman
• passmen
• passment
• passmented
• passmenting
• passments
• pass muster
• pass off
• pass on
• pass one's word
• pass out
• passout
• passouts
• pass over
• Passover
• passport
• passports
• pass round the hat
• pass the bottle of smoke
• pass the buck
• pass the mark
• pass the seel of the day
• pass the time of day