The term "more driftless" suggests the absence of direction or purpose. Its antonyms, on the other hand, entail focus, intentionality, and purposefulness. Words like determined, goal-directed, and driven are antonyms of "more driftless." If you're looking to convey a sense of purpose or direction, you might consider using terms like purposeful, resolute, or driven. These words connote the opposite of feeling aimless, undecided, or unmotivated. Other antonyms for "more driftless" include disciplined, decisive, or steadfast, each of which connotes a sense of direction and willfulness. Employing these antonyms should help to accentuate the contrast between opposing concepts, making your language more expressive and nuanced.