Lǎorenjia niánjì dà le, yīnggāi zài jiā hǎohǎo yíyǎng, búyào zài cāoláo le.
At his age, the old man should stay home and take good care of himself instead of wearing himself out.
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颐 first meant the cheek or jaw, and by extension 'to nourish'. The Summer Palace, 颐和园, is named for nurturing harmony. In modern use 颐养 almost always comes in 颐养天年, to live out one's years in peace.