(sometimes with offor up)
1 to make or become looser: She felt his grip on her arm slacken.
az: boşaltmaq
ru: уменьшать; ослаблять
2 to make or become less busy, less active or less fast: The doctor told him to slacken up if he wanted to avoid a heart-attack.
az: yavaşıtmaq, azaltmaq (sürəti)
ru: замедлять(ся); уменьшать темп