1) Adulterate 2) Defile 3) Infect 4) Pollute 5) Spoil 6) Taint 1) Begrime 2) Bemire 3) Colly 4) Communicate a disease to 5) Corrupt 6) Defile 7) Dirty 8) Foul 9) French word used in English 10) Grime 11) Infect 12) Litter 13) Make dirty 14) Make impure 15) Pass on a disease to 16) Poison 17) Pollute 18) Ruin 19) Soil 20) Spoil 21) Taint 22) To make unclean or impure 
• (v. t.) To soil, stain, or corrupt by contact; to tarnish; to sully; to taint; to pollute; to defile. • (a.) Contaminated; defiled; polluted; tainted.
To make unclean or impure.
To pollute, make unclean or dirty
To cause or result in contamination. ... Origin: L. Con-tamino, to mingle, corrupt ... (05 Mar 2000) ... 
To make unclean or impure.
To pollute, make unclean or dirty
To make impure or unclean by contact or mixture.
To alter or render a material unfit for a specified use, as by the introduction of a chemical.to make impure or unclean
Con·tam'i·nate (-nat) adjective Contaminated; defiled; polluted; tainted. ' Contaminate drink.' Daniel. Con·tam'i·nate (kŏn*tăm'ĭ*nāt) transitive verb [ imperfect & past participle Contaminated ; present participle & verbal noun Contaminating .] [ Latin contaminatus , past participle of contaminare...
Type: Term Pronunciation: kon-tam′i-nāt Definitions: 1. To cause or result in contamination.
[v] - make radioactive by adding radioactive material
to make something polluted or impure
to make impure; pollute
make impure[SAT terms] make impure[Literary terms] make impure