なま怠namaけるkeru
1.
To refrain from engaging in necessary tasks or responsibilities despite having the time, often resulting in wasted time or effort.
2.
To lounge or behave sluggishly, lacking motivation or energy to pursue one's duties.
3.
To show a decline in vigor or enthusiasm, becoming listless or lethargic in one's activities.
Example:
概して人間は怠ける傾向にある。