expiscate
[ ek-spuh-skeyt, ek-spis-keyt ]
/ ˈɛk spəˌskeɪt, ɛkˈspɪs keɪt /
verb (used with object), ex·pis·cat·ed, ex·pis·cat·ing. Chiefly Scot.
to find out by thorough and detailed investigation; discover through scrupulous examination.