Medical Dictionary
Main Entry:
de·vi·tal·ize Variant:
or British de·vi·tal·ise /(')dE-'vIt-&l-"Iz/ Function:
transitive verb Inflected Forms:
-ized or British -ised;
-iz·ing or British -is·ing : to deprive of life or vitality:as
a : to refine (as foodstuffs) to the point that essential or desirable constituents are lost
devitalizes our food and then restores a part ofwhat has been thrown away> b : to subject (a tooth or its pulp) to devitalization
[dee-vahyt-l-ahyz] 
lˌaɪz