1. Beseech: To beg someone earnestly or urgently.
* Example: "I beseech you to reconsider your decision."
2. Cower: To shrink away from something in fear or timidity.
* Example: "The small dog cowered behind the sofa."
3. Dally: To waste time or delay.
* Example: "Don't dally, we have to leave now."
4. Embolden: To make someone more confident or courageous.
* Example: "Her success emboldened her to pursue her dreams."
5. Glower: To stare angrily or sullenly.
* Example: "He glowered at me with a menacing expression."
6. Hark: To listen attentively.
* Example: "Hark! Can you hear that sound?"
7. Implore: To beg someone earnestly or desperately.
* Example: "He implored her to stay."
8. Kowtow: To show excessive deference or servility.
* Example: "He was forced to kowtow to the dictator."
9. Loathe: To feel intense dislike or disgust for something.
* Example: "I loathe the smell of cigarettes."
10. Perambulate: To walk or stroll leisurely.
* Example: "They perambulated through the park, enjoying the sunshine."
11. Quibble: To argue about unimportant details.
* Example: "Don't quibble over the price, it's a fair deal."
12. Reprove: To criticize someone gently or formally.
* Example: "The teacher reproved the student for being late."
13. Scourge: To punish or afflict severely.
* Example: "The disease scourged the entire village."
14. Wrangle: To argue or dispute, especially in a noisy or aggressive way.
* Example: "They wrangled for hours over the contract."
15. Yearn: To have a strong desire or longing for something.
* Example: "She yearned for the days of her youth."
Remember that the "rareness" of these verbs is relative. Some might be more commonly used in specific contexts, while others are indeed quite uncommon in everyday language.