Based on the clue 'adjective meaning completely expressionless used t...', what is the answer?

Based on the clue 'adjective meaning artificial or synthetic', what is the answer? Based on the clue 'adjective meaning big clumsy unwieldy', what is the answer? Based on the clue 'adjective meaning calling for prompt action', what is the answer? Based on the clue 'adjective meaning close to fainting perhaps from a...', what is the answer? Based on the clue 'adjective meaning corresponding in size shape on ...', what is the answer? Based on the clue 'adjective meaning curved inward like the inside of...', what is the answer? Based on the clue 'adjective meaning designed to elude detection', what is the answer? Based on the clue 'adjective meaning elementary or relating to first ...', what is the answer?