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Minimalist Dictionary
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toughening
verb
To make tough.
To become tough.
noun
The process of making something tougher.
Word Frequency 1800~2019
Related words
Other words
suspect
left
duke
frame
cleft
untrained
kindle
leggings
negation
task
bootlace
almighty
rename
bouncy
these
variably
avert
manifesto
unethical
heritage
annealed
baked
burned
burnt
calloused
enured
hardened
inured
sunbaked
tempered
thickened
tough
treated
weather-beaten
hardening