the more ... the more ...; as
Used in the pattern ～ば～ほどに to express a proportional relationship: the more one thing happens, the more another thing happens. Often interchangeable with ほど, but ほどに can sound slightly more formal or literary.
See also: ほど
The more I think about it, the less I know what is right.
The more you practice, the faster you improve.
Archaic usage meaning 'while' or 'during'. Not used in modern Japanese; found in classical texts.
Archaic conjunction/particle meaning 'because' or 'since'. Replaced by ので, から, etc. in modern Japanese.
In classical literary language, it was used to indicate time, as in 'during spring'.
In classical Japanese, it expressed cause or reason, as in 'because it rains'.