(س) وَكِئَ يَوْكَاُ وَكْئًاwakiʾa yawkaʾu wa-kʾan — in the bare triliteral (thulāthī mujarrad), generally it is pronounced تَكِئَ يَتْكَاُ تَكْئًاtakiʾa yatkaʾu takʾan, the wāw being changed to tāʾ: to lean on something for support. (this verb is not used in the Quran).
Form V (tafaʿʿul) تَوَكَّاَ يَتَوَكَّاُ تَوَكُّؤًاtawakkaʾa yatawakkaʾu tawakkuʾan: to lean (with effort), to recline. Only once in the Quran: ﴿قَالَ هِيَ عَصَايَ اَتَوَكَّؤُا عَلَيْهَا﴾ (Ṭā Hā 20:18)
Form VIII (iftiʿāl) اِتَّكَاَ يَتَّكِئُ اِتِّكَآءًittakaʾa yattakiʾu ittikāʾan (اصلاً اِوْتَكَاَaṣlan iwtakaʾa): to sit reclining at ease; it carries the sense of comfort and luxury; مُتَّكِئٌmuttakiʾ pl. مُتَّكِـُٔوْنَmuttakiـٔwna (active participle, ism fāʿil): one reclining comfortably; مُتَّكَاٌmuttakaʾ (passive participle (ism mafʿūl) used as a noun of place): a place for reclining, a lavish banquet. ﴿مُتَّكِـِٕيْنَ فِيْهَا عَلَي الْاَرَآئِكِ﴾ (Al-Kahf 18:31); ﴿وَاَعْتَدَتْ لَهُنَّ مُتَّكَاً﴾ (Yūsuf 12:31); ﴿وَلِبُيُوْتِهِمْ اَبْوَابًا وَّسُرُرًا عَلَيْهَا يَتَّكِـُٔوْنَ﴾ (Az-Zukhruf 43:34)