lam·en·ta·ble
adjective/ləˈmentəbl/, /ˈlæməntəbl/
/ləˈmentəbl/, /ˈlæməntəbl/
(formal)- very disappointing
十分令人失望的；令人遗憾的；使人惋惜的 - She shows a lamentable lack of understanding.
她显得缺乏体谅，实在令人遗憾。
Oxford Collocations DictionaryLamentable is used with these nouns:- failure
Word Originlate Middle English (in the sense ‘mournful’, also ‘pitiable, regrettable’): from Old French, or from Latin lamentabilis, from the verb lamentari, from lamenta (plural) ‘weeping, wailing’. - She shows a lamentable lack of understanding.