in- ‘upon’ + vocare ‘to call’

source: [派手な髪形の遊戯が魔法カード「エクスチェンジ」を自信満々で発動させるGIF画像｜無料GIF画像検索 GIFMAGAZINE 101579]

cite or appeal to (someone or something) as an authority for an action or in support of an argument:

(権威･論拠として)〈原則･人･名前など〉を援用する, 引き合いに出す

«…に対して» 〈法･権利など〉を発動, 行使する «against» ; 〈法など〉に訴える

e.g. the antiquated defense of insanity is rarely invoked today.

call on (a deity or spirit) in prayer, as a witness, or for inspiration.

｟文｠ (加護などを)〈神･詩神〉に訴える, 祈願する

call earnestly for:

e.g. she invoked his help against this attack.

summon (a spirit) by charms or incantation.

(魔法などで)〈霊など〉を呼び出す

give rise to; evoke:

〈感情･情景など〉を想起させる, 呼び起こす

e.g. how could she explain how the accident happened without invoking his wrath?

Computing cause (a procedure) to be carried out.

〘コンピュ〙 〈プログラムなど〉を起動させる, 呼び出す

invoker noun

late 15th century: from French invoquer, from Latin invocare, from in- ‘upon’ + vocare ‘to call’.