pla·cate (plākāt′, plăkāt′)
tr.v. pla·cat·ed, pla·cat·ing, pla·cates
To allay the anger of, especially by making concessions; appease. See Synonyms at pacify.
[Latin plācāre, plācāt-, to calm; see plāk-1 in the Appendix of Indo-European roots.]
pla·cation (plā-kāshən) n.
placa·to′ry (-tôr′ē), placa′tive (-kā′tĭv) adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.