inertia
in|er|tia /ɪn'ɜːrʃə/
1 [N-UNCOUNT]
If you have a feeling of inertia, you feel very lazy and unwilling to move or be active.
...her inertia, her lack of energy...
= lethargy
2 [N-UNCOUNT]
Inertia is the tendency of a physical object to remain still or to continue moving, unless a force is applied to it. (TECHNICAL)
1 [N-UNCOUNT]
If you have a feeling of inertia, you feel very lazy and unwilling to move or be active.
...her inertia, her lack of energy...
= lethargy
2 [N-UNCOUNT]
Inertia is the tendency of a physical object to remain still or to continue moving, unless a force is applied to it. (TECHNICAL)