5 words that I don’t quite understand

1. Porcupine  (n.)  豪豬

    *A porcupine is covered with prickles.

2. Naughty (a.) 頑皮的 ; 猥褻的
   
    *It was naughty of Father to stay out so late.

3. Tight (a.) 緊身的 ; 精練的  (adv.) 緊緊地 ; 牢固地

    *Losing my wallet put me in a tight spot.

4. Giraffe (n.) 長頸鹿

    *The giraffe eats tender leaf from the tree highly.

5. Mattress (n.) 床墊

    *He kept his life's savings under his mattress.