irreplaceable /ir-i-plāˈsə-bl/

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

irreplaceˈably adverb

• pilled
• pillhead
• pillheads
• pillicock
• pillicocks
• pilling
• pillings
• pillion
• pillioned
• pillioning
• pillionist
• pillionists
• pillion-rider
• pillions
• pillion-seat
• pillion-seats
• pilliwinks
• pillock
• pillocks
• pilloried
• pillories
• pillorise
• pillorised
• pillorises
• pillorising