1) Bad-mouth 2) Beef about 3) Belittle 4) Condemn 5) Condemn openly 6) Criticize sharply 7) Denounce 8) Denounce as worthless 9) Disparage 10) Disparage openly 11) Excoriate 12) Express strong disapproval of 13) French word used in English 14) Knock hard 15) Objurgate 16) Openly condemn 17) Openly criticize Found on https://www.crosswordclues.com/clue/decry
• (v. t.) To cry down; to censure as faulty, mean, or worthless; to clamor against; to blame clamorously; to discredit; to disparage. Found on http://thinkexist.com/dictionary/meaning/decry/
De·cry' transitive verb [ imperfect & past participle Decried ; present participle & verbal noun Decrying .] [ French décrier , Old French descrier ; prefix des- (L. dis- ) + crier to cry. See C... Found on http://www.encyclo.co.uk/webster/D/19
to speak disparagingly of; denounce as faulty or worthless; express censure of: She decried the lack of support for the arts in this country. · to condemn or depreciate by proclamation, as foreign or obsolete coins. Found on https://www.infoplease.com/dictionary/decry