Perhaps from све́тлый (svétlyj) + -е́ть (-étʹ). IPA(key): [svʲɪtˈlʲetʲ] <span class="searchmatch">светле́ть</span> • (svetlétʹ) impf (perfective посветле́ть or просветле́ть) to lighten...
IPA(key): [svʲɪtˈlʲelʲɪ] светле́ли • (svetléli) plural past indicative imperfective of <span class="searchmatch">светле́ть</span> (svetlétʹ)...
IPA(key): [svʲɪtˈlʲefʂɨ] светле́вши • (svetlévši) past adverbial imperfective participle of <span class="searchmatch">светле́ть</span> (svetlétʹ)...
IPA(key): [svʲɪtˈlʲejə] светле́я • (svetléja) present adverbial imperfective participle of <span class="searchmatch">светле́ть</span> (svetlétʹ)...
IPA(key): [svʲɪtˈlʲeɫ] светле́л • (svetlél) masculine singular past indicative imperfective of <span class="searchmatch">светле́ть</span> (svetlétʹ)...
IPA(key): [svʲɪtˈlʲejtʲe] светле́йте • (svetléjte) second-person plural imperative imperfective of <span class="searchmatch">светле́ть</span> (svetlétʹ)...
IPA(key): [svʲɪtˈlʲe(j)ɪt] светле́ет • (svetléjet) third-person singular present indicative imperfective of <span class="searchmatch">светле́ть</span> (svetlétʹ)...
IPA(key): [svʲɪtˈlʲe(j)ɪm] светле́ем • (svetléjem) first-person plural present indicative imperfective of <span class="searchmatch">светле́ть</span> (svetlétʹ)...
IPA(key): [svʲɪtˈlʲej] светле́й • (svetléj) second-person singular imperative imperfective of <span class="searchmatch">светле́ть</span> (svetlétʹ)...
IPA(key): [svʲɪtˈlʲejʊt] светле́ют • (svetléjut) third-person plural present indicative imperfective of <span class="searchmatch">светле́ть</span> (svetlétʹ)...