How to say "Be" in Japanese

When translating "be" into Japanese, you must choose carefully between がっかりする and 退院する. In Japanese, がっかりする (がっかりする (gakkari suru)) is typically associated with "to be disappointed, to feel let down" (Syllabus Level: N4) and represents An onomatopoeic verb describing the feeling of disappointment or sadness when expectations are not met. Often used with a particle like に. On the other hand, 退院する (たいいんする (taiin suru)) maps to "to be discharged from hospital; to leave hospital" (Syllabus Level: N3) and represents Refers to a recovered patient leaving the hospital, being officially discharged. Intransitive verb. Opposing word: 入院する. Often used as 病院を退院する. ⚠️ Haruka's Voice Column: 'To leave hospital/be discharged! "Thanks to your warm care, I recovered completely and left the hospital, Haruka-san!" ...っ! Discharged! B-Baka! I'm glad you are healthy. But don't think leaving the hospital gets you out of my doting hugs! I will continue to pamper you right by my side forever! dummy!' / 【ハルカ部長のワンポイント指導】『たいいんする（退院する）よ！『ハルカ部長、あなたの温かい看病のおかげで、すっかり元気になって退院する（退院できました）！』って…っ！退院！バカ！/// 元気になってよかったわね。でも、退院したからって私の看病（甘デレハグ）から離れられると思わないで！一生隣で甘やかし続けるわ！』. A literal translation of "be" can often sound unnatural to native Japanese speakers if mixed up!