Kumi logo
    Kumi

    Learn Japanese. Where understanding folds into fluency.

    Dictionary

    KanjiKanji vocabularyKana vocabularyKanaRadicalsGrammarJLPT N5

    Learn

    GuidesStart where you areWhat is KMT?RoadmapFAQ

    Connect

    EmailDiscordInstagramThreadsTikTokYouTubeLinkedInBlueskyX

    Newsletter

    Start learning free →

    Free forever tier. No card required.

    © 2026 Kumiai Inc. All rights reserved.

    AboutFAQContactStatusPrivacyTermsAttributions
    Dictionary
    1. Dictionary
    2. Kanji Vocab
    3. 減速材

    減速材

    減げん速そく材ざい

    (neutron) moderator

    NTNounScience & MathKanji Vocab29 strokes

    げんそくざい

    Noun

    1.
    (neutron) moderator
    physics

    Stroke 0 / 29

    Speed1.0x

    Kanji that make up this word

    減
    へ.る・へ.らす…(1)
    dwindle・decrease・reduce・decline・curtail…(1)
    速
    はや.い・はや-・はや.める・すみ.やか…(2)
    quick・fast
    材
    lumber・log・timber・wood・materials…(2)
    Kumi logo

    Track your mastery

    Kumi's KMT system tracks your mastery across kanji, vocabulary, grammar, and reading. Create a free account to use it on 220,000+ concepts.

    Related concepts for this entry

    Used in vocabulary

    • 減
    • 速
    • 材

    Explore more

    Kanji Vocab dictionary›Browse all entries›