adverb / conjunction / noun
how
HOW/haʊ/
In what manner or condition something occurs.
The adult shows the child how to open the jar by demonstrating each hand movement.

Etymology
Old English hu already asked in what way something happened. How and why are closely related question words, but their uses distinguish manner or means from reason.
In context
And how can we live gratefully?
How do you spell 'structural'?