na-adjective
heavy-looking; seeming heavy
Describes something that appears heavy or burdensome in a visual or figurative way. Often used with ~な様子 or ~に.
彼は重たげな足取りで歩いていた。
He walked with a heavy-looking gait.
その箱は重たげに見えたが、実際は軽かった。
The box looked heavy, but it was actually light.