| regretfully | (adv) อย่างผิดหวัง |
| regretfully | I was invited last week as well, but it was late so I regretfully turned them down. |
| regretfully | Regretfully it is not possible. |
| regretfully | We regretfully reject your offer. |
| regretfully |
| regretfully |
| regretfully | (adv) with regret (used in polite formulas), Example: I must regretfully decline your kind invitation |