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From tohara + -isha ( causative affix) .
-toharisha (infinitive kutoharisha )
Causative form of tohara : to purify , to cleanse
1973 , Mohammed S. Abdulla, Duniani kuna watu , page 3:[ …] msalani ambako kulikuwa ni faragha ya mambo yote yanayohusu kujikosha, kujisafisha, kujinadhifisha, kujitoharisha na kusali. [ …] the bathroom, where there was privacy for all things related to washing oneself, cleaning oneself, tidying oneself, purifying oneself, and praying.
Conjugation of -toharisha
Positive present
-na toharisha
Subjunctive
-toharishe
Negative
-toharishi
Imperative singular
toharisha
Infinitives
Imperatives
Tensed forms
Habitual
hutoharisha
Positive past
positive subject concord + -li toharisha
Negative past
negative subject concord + -ku toharisha
Positive present (positive subject concord + -na toharisha)
Singular
Plural
1st person
ni natoharisha/na toharisha
tu natoharisha
2nd person
u natoharisha
m natoharisha
3rd person
m-wa(I/II)
a natoharisha
wa natoharisha
other classes
positive subject concord + -na toharisha
Negative present (negative subject concord + -toharishi )
Singular
Plural
1st person
si toharishi
hatu toharishi
2nd person
hu toharishi
ham toharishi
3rd person
m-wa(I/II)
ha toharishi
hawa toharishi
other classes
negative subject concord + -toharishi
Positive future
positive subject concord + -ta toharisha
Negative future
negative subject concord + -ta toharisha
Positive subjunctive (positive subject concord + -toharishe )
Singular
Plural
1st person
ni toharishe
tu toharishe
2nd person
u toharishe
m toharishe
3rd person
m-wa(I/II)
a toharishe
wa toharishe
other classes
positive subject concord + -toharishe
Negative subjunctive
positive subject concord + -si toharishe
Positive present conditional
positive subject concord + -nge toharisha
Negative present conditional
positive subject concord + -singe toharisha
Positive past conditional
positive subject concord + -ngali toharisha
Negative past conditional
positive subject concord + -singali toharisha
Perfect
positive subject concord + -me toharisha
"Already"
positive subject concord + -mesha toharisha
"Not yet"
negative subject concord + -ja toharisha
"If/When"
positive subject concord + -ki toharisha
"If not"
positive subject concord + -sipo toharisha
Consecutive
katoharisha / positive subject concord + -ka toharisha
Consecutive subjunctive
positive subject concord + -ka toharishe
Some forms not commonly seen in modern Standard Swahili are absent from the table. See Appendix:Swahili verbs for more information.