omoshiroi
Omoshiroi (面白い) is a useful Japanese go term denoting a modestly positive outcome from a tactical exchange (or joseki), usually early in the game. The simplest meaning is "good (for Black/White)"; other possibilities are "slightly better", or perhaps "promising". This is distinct from its use in everyday Japanese, where it means "amusing", "fun", "entertaining".
Omoshiroi is almost never used as is in English. Because some dictionaries list "interesting" as a translation for omoshiroi, many go translators have adopted that word, often not even realizing that the word has a technical meaning in go. When you encounter the word "interesting" in translated go materials, then, you should take it as "good for" or "(slightly) better for", not in the common English senses of "thought-provoking" or "noteworthy".
The opposite of omoshiroi is tsumaranai--"bad" or "unpromising".
Omoshiroi can also be used in go contexts in its everyday sense. For example, omoshiroku utsu is to play interestingly, i.e. as one fancies, not plainly.
See also /Discussion, which has now to some extent been incorporated into this article.