Feminine of active participle from qahal; a (female) assembler (i.e. Lecturer): abstractly, preaching (used as a "nom de plume", Koheleth) -- preacher.
see HEBREW qahal
H6953. Qoheleth
קֹהֶ֫לֶת, ( קוֺהֶ֫לֶת Ecclesiastes 12:8) noun masculine1:2 collector (of sentences), or (AV RV) preacher (concionator Jerome: ἐκκλησιαστής ᵐ5 (member of an ἐκκλησία); feminine either of office, Ges§ 122r De Now Che, compare סֹפֶרֶת Ezra 2:55; , Khalif; German Majestät, Excellenz; or as in Arabic with intensive force, one realizing the idea in its completeness (compare great collector, deep investigator (formed like קֹהֶלֶת), WAG i. § 233 R. c. see DrIntr. 466; RVm great orator): hence either convener, or great collector (of sentences), compare אֲסֻמּוֺת בַּעֲלֵי Ecclesiastes 12:11, ק ׳בקּשׁ חפץ דברי למעא 12:10 (but KöEinl. 428 Drl.c. and others speaker in assembly, Plumptre debater)); — ׳ק a king in Jerusalem, son of David, probably = Solomon, the pseudonym of book of Ecclesiastes: 1:1, 1:2 (apposition of אֲנִי), called חכם 12:9; compare 12:10; ק ׳אמר 1:2, הק ׳אמר 12:8 = 7:27 for ק ׳אמרה ᵑ0.