呼び掛ける
よびかける · yobikakeru · JLPT N2 · verb-ichidan
to appeal
📢 呼 (call out) + 掛ける (direct at, aim toward) = call out to, address
掛ける here means to direct something toward a target, as in 声を掛ける (speak to someone). So 呼び掛ける is calling out with your voice aimed at a particular person or crowd.