Theory:

My little horse must think it queer
To stop without a farmhouse near
Between the woods and frozen lake
The darkest evening of the year.
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Explanation:
 
The poet is travelling on a horse, and it's little now. The poet studies the mind of his little horse and assumes that it must think it is pretty strange for them to be stopping in the middle of nowhere, with no one in sight, with not even a farmhouse close by. The poet and his little horse are very cold between the woods and a frozen lake. Also, he thinks it to be the darkest evening of the year.
 
Meanings of difficult words:
 
Numbers
Word
Meaning
1.
Queer
Strange.
2.
Farmhouse
House barn.
3.
Frozen Iced.
Reference:
State Council of Educational Research and Training (2018). Term-1 English Standard-9. Stopping by the woods on a snowy evening - Robert Frost (pp. 146-147). Published by the Tamil Nadu Textbook and Educational Services Corporation.