西地那非

• 西(west; setting sun with bird on nest)ASSOCIATIVE

A bird returning to its nest as the sun sets in the west depicts the character for west.

• 土(earth; soil; land)RADICAL
• 也(also; punctuation mark (archaic))PHONETIC

The wide earth (soil) is also where all things flourish and grow.

• 冉(suggested sound; hint)PHONETIC
• 阝(region; village)RADICAL

A distant land "over there" carries a sound that points to that very place.

• 非(wrong; opposite; deny)ASSOCIATIVE

Two bird wings spread in opposite directions symbolize opposition and negation.