Albert Barnes on 2 Corinthians 11:27

In weariness. Resulting from travelling, exposure, labour, and want. The word κοπω (from κοπτω, to beat, to cut) means, properly, wailing and grief, accompanied with beating the breast. Hence the word means toil, labour, wearisome effort.

And painfulness. This word (μοχθω) is a stronger term than the former. It implies painful effort; labour producing sorrow; and, in the New Testament, is uniformly connected with the word rendered "weariness," (1Thes 2:9; 2Thes 3:8,) rendered in both those places "travail."

In watchings often. In loss of sleep, arising from abundant toils and from danger. 2Cor 6:5.

In hunger and thirst. From travelling among strangers, and being dependent on them and on his own personal labours. 1Cor 4:11.

In fastings often. Either voluntary or involuntary. 2Cor 6:5.

In cold and nakedness. 1Cor 4:11.

(b) "watchings often" Acts 20:31 (c) "hunger and thirst" 1Cor 4:11