The word "心无旁骛" is formed by combining four characters: "心" meaning heart or mind, "无" meaning without, "旁" meaning side or other, and "骛" meaning to pursue or seek, here referring to distractions. The phrase structures as "心无" (heart without) followed by "旁骛" (side pursuits), literally creating the meaning of a mind without distracting pursuits, thus conveying focused concentration.