Designer John Koenig’s website, the Dictionary of Obscure Sorrows, a “compendium of invented words,” defines “sonder” as “the realization that each passerby has a life as vivid and complex as your own.” The title of Kishi Bashi’s latest album, Sonderlust, implies the multi-instrumentalist has an intense desire for that newly named reckoning. Lyrically, the album features some of his most emotionally raw songs to date. Stylistically, it pushes further into electropop and disco than previous efforts, resulting in a sound both resplendent and poignant. Kishi Bashi plays on Thursday, April 20, at Signal Kitchen in Burlington. Tall Tall Trees and locals the DuPont Brothers open.