relentless

US /rɪˈlɛntlɪs/

UK /rɪ'lentləs/

C1
adj.AdjectiveContinuing without slowing or losing strength
The rain was relentless, starting early in the morning and continuing steadily throughout the whole night
adj.AdjectivePersistent and determined; refusing to give up or be deterred.
She was a relentless competitor, never giving up until the final whistle.
adj.AdjectiveUnceasingly intense; harsh or inflexible.
The relentless heat of the desert sun made travel difficult.

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Why McDonald's won fries

11:04Why McDonald's won fries