laborious
Concise Oxford English Dictionary © 2008 Oxford University Press:
laborious /ləˈbɔːrɪəs/
▶adjective requiring considerable time and effort.
■ (of speech or writing style) showing obvious signs of effort.
– derivatives
laboriously adverb,
laboriousness noun.
laboriously adverb,
laboriousness noun.
– origin ME: from OFr. laborieux, from L. laboriosus, from labor ‘labour’.
'laborious' also found in these Oxford entries:
