feckless

As adjectives the difference between unreliable and feckless

is that unreliable is not reliable while feckless is lacking purpose.

As adjectives the difference between pensive and feckless

is that pensive is having the appearance of deep, often melancholic, thinking while feckless is lacking purpose.

As a noun default

is (finance) the condition of failing to meet an obligation.

As a verb default

is to fail to meet an obligation.

As an adjective feckless is

lacking purpose.

As adjectives the difference between inept and feckless

is that inept is not able to do something; not proficient; displaying incompetence while feckless is lacking purpose.

As adjectives the difference between feckless and stupid

is that feckless is lacking purpose while stupid is lacking in intelligence or exhibiting the quality of having been done by someone lacking in intelligence.

As an adverb stupid is

extremely.

As a noun stupid is

a stupid person; a fool.

As adjectives the difference between bootless and feckless

is that bootless is without boots or bootless can be profitless; pointless; unavailing while feckless is lacking purpose.

As adjectives the difference between carefree and feckless

is that carefree is without cares; free of concern or worries; easy; casual; without difficulty while feckless is lacking purpose.

As adjectives the difference between feckless and jejune

is that feckless is lacking purpose while jejune is not nutritious.

As adjectives the difference between feckless and shiftless

is that feckless is lacking purpose while shiftless is lazy, unmotivated.