sijua
Sijua is a Swahili verb-form that expresses lack of knowledge, roughly translating to "I do not know." It is the first-person singular present negative form of the verb kujua, meaning to know. While sijua exists in use in some varieties and older or poetic texts, the more common contemporary expression for “I don’t know” in standard Swahili is sijui.
Usage of sijua generally conveys ignorance about a fact, a situation, or a piece of information. It
Phonology and morphology: sijua is formed with the prefix si- indicating negation and the verb stem jua
Etymology: sijua derives from the Swahili verb kujua, meaning to know, combined with the negative prefix si-