verb (used with or without object), ex·pert·ized, ex·pert·iz·ing.
to study or investigate as an expert.
Also especially British, ex·pert·ise.
Origin of expertize
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US to act as an expert or give an expert opinion (on)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012