Explore each form from the oldest known stage to today.
The kanji 探 is a phono-semantic compound, formed during the Shuowen Jiezi era (c. 100 AD) in China. Its semantic component is the radical 扌(hand), indicating an action performed with the hand. The phonetic component is 罙 (shēn), which itself is a compound meaning "deep" (穴, cave, over 木, tree, suggesting reaching deep into something). The original meaning was to reach or grope for something with the hand in a deep or concealed place, hence "to search for." Historically, the character evolved from this concrete action of physically probing to the more abstract sense of "to look for" or "to investigate." It was not a pictograph but an abstract ideographic construction. The phonetic element 罙 eventually fell out of common use in modern Chinese, but its form was slightly simplified and conflated with the similar-looking 深 (deep), which shares the same phonetic origin and a conceptually related meaning of profundity. The character 探, along with the vast majority of the kanji system, was introduced to Japan in several waves, primarily from the 5th to the 8th centuries AD, via Buddhist scriptures, classical Chinese texts, and official seals. It was adopted into the Japanese writing system as a kokuji, or borrowed Chinese character, retaining its core meaning. A key linguistic note is the Japanese kun'yomi reading "sagu-ru," which preserves the original concrete nuance of groping or feeling around for something, often in the dark or without visual guidance. This contrasts with the more general on'yomi reading "TAN" used in compounds like 探検 (tanken - exploration) and 探求 (tankyū - quest), which cover the broader, more abstract sense of searching. This duality in readings effectively captures the etymology's journey from a specific physical action to a general conceptual one.