The word "一蹴而就" is formed by sequentially combining the characters 一 (meaning "one"), 蹴 (meaning "kick" or "step"), 而 (a conjunctive particle meaning "and then"), and 就 (meaning "accomplish" or "succeed"). This literal arrangement depicts a single action (蹴) directly leading to a result (就), with 一 emphasizing the singularity of the action and 而 connecting the action to the outcome, thus creating a phrase that denotes achieving something quickly and effortlessly.