If you do not drink enough water, you will become dehydrated and fall into a state of languor.
His whole life was indeed one continued illness, but in this part of it his pain and languor had greatly increased.
Being strongly in favour of peace, Pelham carried on the war with languor and indifferent success, but the country, wearied of the interminable struggle, was disposed to acquiesce in his foreign policy almost without a murmur.