Helpful resources
You might find the below resource useful
TUKI (Taasisi ya Uchunguzi wa Kiswahili) (2001). Kamusi ya Kiswahili-Kiingereza. Dar es Salaam: Institute of Kiswahili Research.Available as free Swahili to English offline dictionary for iPhone, Android, PC and Mac.
TUKI (Taasisi ya Uchunguzi wa Kiswahili) (2000). English-Swahili Dictionary (2nd ed.). Dar es Salaam: Institute of Kiswahili Research. Available as free English to Swahili offline app for iPhone, Android, PC and Mac.
OXFORD (Kamusi ya Kiswahili Sanifu (TUKI)) Toleo la tatu
KAMUSI YA VISAWE (Swahili Dictionary of Synonyms = Swahili Dictionary of Synonyms = Swahili Dictionary of Synonyms (Swahili Edition) )
THE KAMUSI PROJECT ENGLISH-SWAHILI DICTIONARY (Project International and Kamusi Project USA. Email address: kpi@kamusi.org)
English-Swahili Swahili-English Immersive Dictionary by Fidèle Mpiranya
Reference
Florence Indede Benard Odoyo Okal and Ernest Sangai Mohochi. UCHANGANUZI WA HIPONIMIA ZA VITENZI VYA KISWAHILI. Academia.edu, 2016.
Gideon Kotzé. Building a WordNet for Afrikaans: Preliminary research in the form of an inquiry into the feasibility and optimal methodology for the development of a wordnet database. thesis, 2006.
George A. Miller. WordNet: A Lexical Database for English. The MIT Press, May 9, 1998.
Piek Vossen. Building a multilingual database with wordnets for several European languages. https://archive.illc.uva.nl/EuroWordNet/, 2005.
Piek Vossen. Building wordnets. http://www.globalwordnet.org/gwa/BuildingWordnets.ppt, 2005.