The adjectives regretful and regrettable are distinct in meaning: regretful means 'feeling or showing regret', as in she shook her head with a regretful smile, while regrettable means 'giving rise to regret; undesirable', as in the loss of jobs is regrettable. The adverbs regretfully and regrettably have not, however, preserved the same distinction. Regretfully is used as a normal manner adverb to mean 'in a regretful manner', as in he sighed regretfully, but it is also used as a sentence adverb meaning 'it is regrettable that', as in regretfully, the trustees must turn down your request. In this latter use it is synonymous with regrettably. Despite objections from traditionalists, this use is now well established （more than 30 per cent of citations in the British National Corpus for regretfully are in this disputed sense） and is included in most modern dictionaries without comment.