What is the meaning of the word feckless?

The word "feckless" means lacking in efficiency or vitality, often relating to someone who is incompetent or ineffective in their actions. Therefore, the choice "incompetent" accurately captures this meaning. A person described as feckless might struggle to complete tasks or fulfill responsibilities due to a lack of ability, determination, or effectiveness. Understanding this word is especially useful in contexts where someone's capability or work ethic is being evaluated.

The other choices don't align with the definition of "feckless." "Significant" refers to something that has meaning or importance, "relevant" relates to being connected or applicable to a matter, and "headstrong" describes someone who is determined to have their own way, often despite advice or suggestions. These meanings do not convey the sense of ineffectiveness or incompetence associated with fecklessness.