My opinion of the central Idea of the poem The Road Not Taken is this, Life may give you two paths and the one with the hardest obsticles is the one most worth taking. Things may be hard but it isn't the years in life you count but the life in the years.
I hope this helps some.
Answer:
The tone of the story is The poem's speaker feels constrained by social conventions (which she metaphorically calls “Prose”), and compares this sense of confinement to being locked away as a little girl so that she would be “still.”
Antonyms for teeming would be: low, empty, ( Remember, Antonym, means the opposite).
The speaker see’s life as full of suffering.