com·pre·hend 
/ˌkɑ:mprɪˈhɛnd/ verb
com·pre·hends; com·pre·hend·ed; com·pre·hend·ing /ˌkɑ:mprɪˈhɛnd/ verb [+ obj] somewhat formal : to understand (something, such as a difficult or complex subject)
▪ He is able to fully comprehend [=understand completely] what is happening and react appropriately. — often used in negative statements ▪ They are unable to comprehend what had happened. ▪ We can scarcely comprehend how it all ended. ▪ I find his attitude impossible/difficult to comprehend.
▪ He is able to fully comprehend [=understand completely] what is happening and react appropriately. — often used in negative statements ▪ They are unable to comprehend what had happened. ▪ We can scarcely comprehend how it all ended. ▪ I find his attitude impossible/difficult to comprehend.
