Definition of lamentable adjective from the Oxford Advanced American Dictionary

 

lamentable

 adjective
adjective
NAmE//ləˈmɛntəbl//
 
(formal)
 
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very disappointing synonym deplorable, regrettable She shows a lamentable lack of understanding.
NAmE//ləˈmɛntəbli//
 
adverb
See the Oxford Advanced Learner's Dictionary entry: lamentable