punishing

US /ˈpʌn.ɪ.ʃɪŋ/
UK /ˈpʌn.ɪ.ʃɪŋ/
1.

trừng phạt

very difficult and making you feel tired:

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Currently she has a punishing schedule of five presentations a day.
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punishmentpunishcorporal punishmentcapital punishment