Usage 1: Hearsay / Inference ("apparently," "it seems")
Usage 2: Typical of / Befitting ("-like," "-ish")
らしい conjugates as an い-adjective:
らしい has two distinct usages in Japanese: expressing hearsay/inference based on external information, and describing something as typical of or befitting a certain category.
When attached to verbs, adjectives, or nouns, らしい conveys that the speaker has gathered information from an external source (news, rumors, someone else's words, indirect evidence) and is relaying it. Unlike そうだ (hearsay), which directly quotes a source, らしい suggests the speaker has processed the information and is presenting their own conclusion based on it.
Structure:
な-adjectives and nouns attach directly to らしい without だ.
For past events, the preceding verb or adjective takes the past form:
When attached to a noun, らしい can mean "befitting," "typical of," or "like a proper ~." In this usage, it functions as an い-adjective.
A common pattern is なうんNoun + らしい + the same noun, which emphasizes that something truly lives up to its name:
らしい conjugates like an い-adjective: らしくない (negative), らしかった (past), らしくなかった (past negative). However, for the hearsay meaning, the tense is usually carried by the preceding word rather than by らしい itself.