cacophonic: dissonant

tied to the idea of a harsh and meaningless mixture

adjectival form of cacophony - discordant sound

concatenate: link together or unite end-to-end

from catena - chain

string concatenation makes computer scripts lighter  

computer voices tell time by concatenating smaller bits like "one" and "thirty"

desecrate: to make unholy or perform sacrilege, remove from office, divest

as opposed to consecrate - to make or declare sacred

dissipate: to waste extravagantly, squander, deplete, disperse, disintegrate

from disperse - throw apart

exigency: urgent demand, requirement or necessity

a.k.a. exigence

from exigent - urgent

imbricate: in an overlapping sequence (adjective)

as in, scales, leaves, tiles, rooms

from imbrex/imbbrices - convex tile/s

interstice: a small intervening space

interstit = to stand or put between

similar to intervene

machinate: to invent, contrive, plot, usually maliciously

as in, I machinated this bad thing that just happened and I'm gonna machinate another

similar to machine in the sense of a device or contrivance

obsequy: funeral ceremony

derivative of obsequium - compliance, dutiful service

same root as obsequious - ingratiating, servile

sarcophagic: flesh-eating, carnivorous

a.k.a. sarcophagous

sarco = flesh

same root as sarcophagus 

no comparable (-er) or superlative (-est) form 

sardonic: mocking, cynical

adjectival form of sardonicism - skeptical humour

as in, sardonic grin, sardonic laughter, a grin caused by facial muscle spasms

tied to the idea of death by convulsive laughter (said in folklore to be caused by eating the sardonion plant from Sardinia, Italy)

sophistry: a false argument intended to deceive

plural: sophistries

from the Greek work sophia - wisdom or learning

similar to philosophy = love of learning

sophist - someone who uses clever but deceptive arguments

sophism - a school of thought in Ancient Greece

Plato and Aristotle didn't like sophists and helped turn sophistry into a derogatory term

antisophism is also a word

supersession: either the act of superseding or the state of being superseded

implies its opposite

from supersedere - to sit above or forbear

adjectival forms: superseding, superseded,  supersedable 

tendentious: showing a bias or purpose

from tendency - inclination