since    (cause, not time) ko, nuko
(now that, seeing that) ubwo
En-En dictionary 
ko     conj    1. since (cause, not time), 2. that, 3. as
guhema (-hemye)     v    1. to offer but take back, 2. to be insincere, 3. to make fun of, 4. to be ironic, sarcastic
guhemana (-hemanye)     v    to be insincere with each other
ubwo   1. perhaps, 2. now that, 3. since, 4. seeing that, 5. moreover
 since found in: Kirundi I (Study lessons)
lesson 26   Class 7 aka–, utu–
lesson 27   Class 8 ubu–, ama–
lesson 33   Class 10 aha-
lesson 35   Vowel-stem Verbs
lesson 51   Ordinary Past Tense I
lesson 71   Far Past Tense
lesson 79   Causative Verbs II
lesson 86   Demonstrative Adjectives I
lesson 106   Reciprocal Form of Verb
lesson 108   Adverb –te? Comparisons
 since found in: Kirundi II (Grammar)
chapter 71   Conjunction ko
 since found in: Music & Lyrics
Music    Njana Njana