1. In an optional manner
   "this rule is applied optionally"

See also: optional

Antonym: obligatorily

• dishonourably
• dishonoured
• dishpan
• dishrag
• dishtowel
• dishware
• dishwasher
• dishwasher detergent
• dishwashing
• dishwashing detergent
• dishwashing liquid
• dishwashing machine
• dishwater
• dishy
• disillusion
• disillusioned
• disillusioning
• disillusionment
• disincarnate
• disincentive
• disinclination
• disincline
• disinclined
• disinfect
• disinfectant