how
UK[haʊ]US[haʊ]
adv
in what way or manner; by what means
adv
to what extent, degree, or amount
adv
in what state or condition
adv
for what reason; why
conj
the way or manner in which
conj
that
n
a method or manner of doing something
Etymology
The word 'how' originates from the Old English 'hū', which is an adverbial form of the Proto-Germanic interrogative base 'hw-'. This base is also the source of other English question words like 'what', 'when', and 'where'. It can be traced further back to the Proto-Indo-European root 'kwo-', the stem of relative and interrogative pronouns. The semantic journey from a general interrogative base to a specific word inquiring about manner, condition, or degree illustrates the specialization of function within the language family. Its form has remained remarkably stable from Old English to the present day, retaining its core grammatical role.
Analysis
The word 'how' is a simplex word derived from Old English 'hū', an adverbial form of the interrogative base 'hw-'. It functions as an interrogative and relative adverb and conjunction in modern English.
Examples
How did you solve this difficult problem?
I remember how we used to play in these woods as children.
The manual explains the how and why of the procedure.