Robert Frost’s style is a complex and elusive element of his poetry. Although it’s challenging to define precisely, we can explore some insights provided by Frost himself. In a letter to his friend Louis Untermeyer dated March 10, 1924, Frost discussed his perspective on style:
Dear Old Louis:
Since last I saw you I have come to the conclusion that style in prose or verse is that which indicates how the writer takes himself and what he is saying. Let the sound of Stevenson go through your mind empty and you will realize that he never took himself other than as an amusement. Do the same with Swinburne and you will see that he took himself as a wonder. Many sensitive natures have plainly shown by their style that they took themselves lightly in self-defense. They are the ironists. Some fair to good writers have no style and so leave us ignorant of how they take themselves. But that is the one important thing to know: because on it depends our likes and dislikes. A novelist seems to be the only kind of writer who can make a name without a style: which is only one more reason for not bothering with the novel. I am not satisfied to let it go with the aphorism that the style is the man. The man's ideas would be some element then of his style. So would his deeds. But I would narrow the definition. His deeds are his deeds; his ideas are his ideas. His style is the way he carries himself toward his ideas and deeds. Mind you if he is down-spirited it will be all he can do to have the ideas without the carriage. The style is out of his superfluity. It is the mind skating circles round itself as it moves forward. Emerson had one of the noblest least egotistical of styles. By comparison with it Thoreau's was conceited, Whitman's bumptious. Carlyle's way of taking himself simply infuriates me. Longfellow took himself with the gentlest twinkle.
Even after this explanation, Frost’s style remains somewhat enigmatic. Another attempt to elucidate his style can be found in a lecture he gave in 1935 at the Winter Institute of Literature at the University of Miami, titled “Before the Beginning and After the End of a Poem”:
Frost said, "In the creative act, a certain impulse or state of mind precedes the writing of the poem. Next comes what Stevenson called 'a visitation of style', a power to find words which will somehow convey the impulse."
A crucial component of Frost’s style is his diction. He frequently employs everyday language, crafting sentences with meter and rhythm to enhance their aesthetic appeal. Additionally, he utilizes various poetic devices to add depth and craftsmanship to his work.