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perish

perish /ˈperɪʃ/ verb
perishes; perished; perishing
perish
/ˈperɪʃ/
verb
perishes; perished; perishing
Britannica Dictionary definition of PERISH
[no object]
formal + literary : to die or be killed
formal : to disappear or be destroyed : to cease to exist
British : to slowly break apart by a natural process

perish the thought

used to say that you hope that something does not happen or to say that something will not happen