Inside the Universes

'regretful'

[regretful.a.01] as in: feeling or expressing regret or sorrow or a sense of loss over something done or undone

Examples:
felt regretful over his vanished youth
regretful over mistakes she had made
he felt bad about breaking the vase

Origins

					regretful (English)
├── -ful (English)
└── regret (English)
    └── regretten (Middle English (1100-1500))
        └── regreter (Old French (842-ca. 1400))