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streptobacillus
streptocarpus
streptococcus
streptodornase
streptokinase
streptolysin
streptomyces
streptomycin
STRESS
stress
stress fracture
stress genes
stress management
stress mark
stress out
stress puppy
stressed out
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strengthen

strength·en [ stréngthən ] (past and past participle strength·ened, present participle strength·en·ing, 3rd person present singular strength·ens)


transitive and intransitive verb 
Definition:
 
become or make something stronger: to make something stronger or more powerful, or increase in strength or power


strength·en·er noun
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