1. heavy; weighty
きっと重い扉に違いない。It must be a heavy door.
2. heavy (feeling); depressed; gloomy; blue; uneasy
重い気分だけ残った。Only a heavy feeling remained.
3. slow; sluggish; lumbering; ponderous; clumsy
彼らの足取りはひどく重かった。Their steps were terribly heavy.
4. important (position, responsibility, etc.); serious; grave
5. serious (punishment, illness, etc.); severe; critical
疲れてしまったら、病気が重くなる。If you become exhausted, your illness will become more severe.
6. solid; established; dignified; sensible
7. heavy (shape or stones); solid stones that must be defended rather than sacrificed, despite the high cost of doing so