1. Incapable of being modified in form or character or strength (especially by making less extreme)
   "these variations from custom are illogical, incomprehensible, and unmodifiable"

Antonym: modifiable

• implacability
• implacable
• implacably
• implant
• implantation
• implanted
• implausibility
• implausible
• implausibleness
• implausibly
• implead
• implement
• sweet wattle
• sweet white violet
• sweet William
• sweet woodruff
• sweet wormwood
• sweet-birch oil
• sweet-breathed
• sweet-faced
• sweet-flavored
• sweet-flavoured
• sweet-potato ring rot
• sweet-potato whitefly
• sweet-scented