cannot help but

Compelled to do

Cannot help but expresses inability to resist an action or feeling: I cannot help but admire her persistence, He couldn't help but laugh.

The phrase combines two constructions—"cannot help doing" and "cannot but do"—that mean the same thing.

Purists sometimes object to the redundancy, but the merged form is well established in standard English.

Related

irresistible · drawn · drawn to · required · entranced · captivated · mesmerized · bound · have got to · inescapable · destined · necessity · instinctive · fascinated · obsessed · overwhelmed · enchanted · urged

Opposites
volition and choice

cannot help butby choice

optionally · free to choose

resistance and control

cannot help butresist

Oppose or refuse compliance

keep from · withhold · contain oneself

Family

cannot, help, helps, helped, helping, helper, helpers, helpful, helpfully

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G