-----------------------------------
きつい， キツイ
1. tough, hard, severe, demanding, harsh
2. determined, strong-minded, forceful, formidable, fierce
3. strong (e.g. sunlight, alcohol), severe, intense
4. (too) tight, constricting, close
5. extreme, unusually strong
痛苦，困难
-----------------------------------
縛る， しばる
1. to tie, to bind, to fasten
2. to restrict (freedom), to tie down (with rules, regulations, etc.), to fetter
捆，绑；束缚，限制
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
