Introduction. The article examines lexical and phonetic features of Abyisky Yakut — a least studied dialect of the northeastern zone. Goals. The study seeks to document and analyze linguistic characteristics of the specified dialect traced in field data collected in 2025 across Abyisky District of the Sakha Republic (Yakutia). Special attention is paid to lexical particulars shaped by long-term language contact with Even and Russian. Results. The paper provides a detailed analysis of Tungus-Manchu loanwords, primarily ones related to hunting and fishing, as well as Russian borrowings phonetically adapted to Yakut. Of particular interest are motivationally driven nominations that reflect the connection between language, traditional culture, and subsistence practices of the local population. The phonetic section includes a thorough insight into the vowel and consonant systems. The study identifies some archaic features, such as akanye, shortening of long vowels, nasalization of consonants, and interference with literary norms. The work shows the present-day dialect is characterized by mixed use of both dialectal and literary patterns indicative of its active transformation. The obtained results are of significant value for Yakut dialectology, areal linguistics and comparative studies. The collected data shall contribute to the preservation of the linguistic diversity of Russia’s North and may be used in lexicographic and ethnolinguistic practices. The study somewhat opens prospects for the creation of a multimedia dialect atlas and further investigation of language contact mechanisms in multiethnic regions. The conducted research makes an essential contribution to the documentation of endangered dialects and broadens the understanding of Yakut dialectal diversity. The work can be of certain interest to both linguists proper and researchers engaged in language policies and preservation.