- Abnormal
- Bizarre
- Curious
- Eccentric
- Eccentric old maid sent off mail
- Even good ad’s strange
- Evenly loaded? That’s peculiar
- Cryptic
- Hard to understand
- Mysterious
- Mysterious giant mice on the rampage
- Mysterious little movement below coding machine
- Perplexing
- Puzzling
- Agatha Christie’s first Poirot detective tale, The — Affair at Styles
- Enigmatic
- My unusual stories involving you are difficult to explain
- Puzzling
- Yes, tourism can be very strange
- Of or pertaining to mystery; containing a mystery;
difficult or impossible to understand; obscure not revealed or
explained; enigmatical; incomprehensible.
- Firmest
- Most difficult
- Most puzzling
- The most difficult harvest was taken from five to five hundred
- Toughest
- Conundrums
- Puzzling problems
- Show-offs