1. not doubled; single rather than paired or duplicated

Examples

• The undoubled consonant in the middle of the word indicates a long vowel sound.
• She preferred the undoubled recipe portion for just two people.
• The undoubled thread was too weak for heavy-duty sewing.
• In bridge, an undoubled contract carries lower penalty points.
• The undoubled fabric layer made the curtains more lightweight.
• His undoubled effort this time was clearly insufficient for the task.