The definition of inveigh is to rant against something, or to speak or write about something with great hostility.(verb)
When an impassioned conservative writes a long column about her opinion of a new democratic policy, this is an example of when she inveighs.
See inveigh in Webster's New World College Dictionary
Origin: ME invehen < L invehi, to assail, attack with words, pass. of invehere, to bring in < in-, in, to + vehere, to carry: see vehement
See inveigh in American Heritage Dictionary 4
intransitive verb in·veighed, in·veigh·ing, in·veighs
Origin: Latin invehī, to attack with words, inveigh against
Origin: , passive of invehere, to carry in
Origin: : in-, in; see in-2
Origin: + vehere, to carry; see wegh- in Indo-European roots.
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