godan verb (-mu), transitive verb
Implies a secret, often underhanded plan. Used for plotting something bad, a trick, or a conspiracy. The object is marked with を.
彼らは銀行強盗をたくらんでいる。
They are plotting a bank robbery.
何か悪いことをたくらんでいる顔だ。
He has a face like he's scheming something bad.