x1 is a kanji (Japanese logograph) with kun'yomi (native, Sino-Japanese reading) x2, on'yomi (compound, Chinese reading) x3, with etymology/meaning/radical/s x4.
Merge of ponjo + .anji. Note that there may be many readings; x2 & x3 should be individual readings, not sets. In the rare case of no readings of particular type, zi'o should be used. x4 can be either a meaning, a fully specified set of meanings, a fully specified set of radicals, a single radical, the earlier form of the kanji, stroke order, or even the Chinese equivalent (taking into account that there are minor discrepancies between the Japanese and Chinese forms, and that the simplified Chinese characters are totally different).