| Answer | Crossword Clue |
|---|---|
| trying | Difficult or annoying; hard to endure |
| bullet | to force oneself to perform a painful, difficult task or to endure an unpleasant situation |
| puzzles | Think hard about something difficult to understand or explain |
| puzzle | Think hard about something difficult to understand or explain |
| arduous | hard to accomplish or achieve difficult years of arduous training |
| difficult | hard to do, make, or carry out arduous a difficult climb |
| heaviest | (of a literary work) Hard to read or understand because overly serious or difficult |
