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The Japanese word

意気込む

is pronounced
ikigomu | いきごむ
means
to be enthusiastic about
Examples:
初めから意気込みすぎると、途中で息切れするぞ。
hajime kara ikigomi sugiru to, tochū de ikigire suru zo.
You have to pace yourself or you'll choke halfway through.
せっかく、英語で注文しようと意気込んで入ったのに、日本語で「いらっしゃいませ」って言われた。あれ?って感じ。
sekkaku, eigo de chūmon shiyo u to ikigon de haitta noni, nihongo de ' irasshai mase ' tte iwa re ta. are? tte kanji.
After I got all worked up about ordering in English, I walked in the store and they greeted me with "Irasshaimase!" I felt, like, "What the ...?".
Examples sourced from tatoeba.org