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relaxation
mastery UK /ˌriː.lækˈseɪ.ʃən/ US /rᵻˌlækˈseɪ.ʃən/noun
card 1 of 10 · preposition
After the pandemic, there was a gradual relaxation _____ strict safety requirements in hospitals.
card 1 of 10 · preposition
After the pandemic, there was a gradual relaxation _____ strict safety requirements in hospitals.