cog ‧ i ‧ tate /ˈkɒdʒəteɪt, ˈkɒdʒɪteɪt $ ˈkɑː-/ BrE AmE verb [intransitive + about/on]
[ Date: 1500-1600 ; Language: Latin ; Origin: past participle of cogitare , from co- ( ⇨ ↑ co- ) + agitare ( , ↑ agitate ) ]
formal to think carefully and seriously about something
—cogitation /ˌkɒdʒəˈteɪʃ ə n, ˌkɒdʒɪˈteɪʃ ə n $ ˌkɑː-/ noun [uncountable]