unconscientious
/ˌʌnkɒnʃɪˈɛnʃəs/ /ˌʌŋkɒnʃɪˈɛnʃəs/adjective
1Having no conscience; acting or inclined to act without regard for what is right; unscrupulous. Also: failing to perform one's work or duty well or thoroughly; careless, irresponsible.
2Made, done, or gained without regard for conscience or duty; exhibiting or characterized by unscrupulousness or irresponsibility.
- Now frequently in legal contexts..
Origin
Mid 17th century; earliest use found in Robert Baillie (1599–1662), Church of Scotland minister and author. From un- + conscientious.
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- chamberlain ayre
- chamberlaincy
- Chamberlainism
- Chamberlainite
- Chamberlain, Joseph
- Chamberlain, Neville
- Chamberlain, Owen
- Chamberlain, Richard
- chamberlainry
- chamberlainship
- Chamberlain, Wilt
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- chamber musician