海の氷はきわめて変わりやすい——寒く風のない天候のときは固く凍っているが、嵐のときは外洋の広い水域で割れてしまう。
Sentence Analyzer
English Translation
        The sea ice is highly variable - frozen solid during cold, calm weather and broken up in large areas of open water during storms.
    
Furigana
Romanji
        Umi no kōri wa kiwamete kawari yasui  samuku kaze no nai tenkō no toki wa kataku kōtteiru ga, arashi no toki wa gaiyō no hiroi suiiki de wareteshimau.
    
Words
            
                海
            
            
                (うみ、み、わた、わだ)
            
        
        
            sea; ocean; waters
        
    
            
                の
            
            
                (の)
            
        
        
            indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
        
    
            
                氷
            
            
                (こおり)
            
        
        
            ice; shaved ice (usually served with flavored simple syrup)
        
    
            
                は
            
            
                (は)
            
        
        
            topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
        
    
            
                極めて
            
            
                (きわめて)
            
        
        
            exceedingly; extremely; decisively
        
    
            
                変わる
            
            
                (かわる)
            
        
        
            to change; to be transformed; to be altered; to vary; to move to; to be different; to be uncommon; to be unusual
        
    
            
                易い
            
            
                (やすい)
            
        
        
            easy; likely to ..., have a tendency to ...; easy to ...
        
    
            
                寒い
            
            
                (さむい、さぶい)
            
        
        
            cold (e.g. weather); uninteresting (esp. joke); lame; dull; weak; corny
        
    
            
                風
            
            
                (かぜ)
            
        
        
            wind; breeze; draught; draft; manner; behaviour; behavior; cold; influenza
        
    
            
                ない
            
            
                (ない)
            
        
        
            not; emphatic suffix
        
    
            
                天候
            
            
                (てんこう)
            
        
        
            weather
        
    
            
                とき
            
            
                (とき)
            
        
        
            regular (stops at every station) Jouetsu-line Shinkansen
        
    
            
                硬い
            
            
                (かたい)
            
        
        
            hard; solid; tough; stiff; tight; wooden; unpolished (e.g. writing); strong; firm (not viscous or easily moved); safe; steady; honest; steadfast; obstinate; stubborn; bookish; formal; stuffy
        
    
            
                凍る
            
            
                (こおる)
            
        
        
            to freeze; to be frozen over; to congeal
        
    
            
                が
            
            
                (が)
            
        
        
            indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
        
    
            
                嵐
            
            
                (あらし)
            
        
        
            storm; tempest; difficulty; trouble
        
    
            
                外洋
            
            
                (がいよう)
            
        
        
            open sea; ocean
        
    
            
                広い
            
            
                (ひろい)
            
        
        
            spacious; vast; wide
        
    
            
                水域
            
            
                (すいいき)
            
        
        
            waters; water area
        
    
            
                で
            
            
                (で、にて)
            
        
        
            indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.
        
    
            
                割れる
            
            
                (われる)
            
        
        
            to break; to be smashed; to split; to crack; to fissure; to be torn; to be divided; to cleave; to come to light; to be identified; to be established; to become clear
        
    Kanji
Readings: カイ、 うみ
                        Meanings: sea, ocean
                    Readings: ヒョウ、 こおり、 ひ、 こお.る
                        Meanings: icicle, ice, hail, freeze, congeal
                    Readings: ヘン、 か.わる、 か.わり、 か.える
                        Meanings: unusual, change, strange
                    Readings: カン、 さむ.い
                        Meaning: cold
                    Readings: フウ、 フ、 かぜ、 かざ-、 -かぜ
                        Meanings: wind, air, style, manner
                    Readings: テン、 あまつ、 あめ、 あま-
                        Meanings: heavens, sky, imperial
                    Readings: コウ、 そうろう
                        Meanings: climate, season, weather, wait for, expect
                    Readings: コ、 かた.める、 かた.まる、 かた.まり、 かた.い
                        Meanings: harden, set, clot, curdle
                    Readings: トウ、 こお.る、 こご.える、 こご.る、 い.てる、 し.みる
                        Meanings: frozen, congeal, refrigerate
                    Readings: ラン、 あらし
                        Meanings: storm, tempest
                    Readings: ガイ、 ゲ、 そと、 ほか、 はず.す、 はず.れる、 と-
                        Meaning: outside
                    Reading: ヨウ
                        Meanings: ocean, western style
                    Readings: コウ、 ひろ.い、 ひろ.まる、 ひろ.める、 ひろ.がる、 ひろ.げる
                        Meanings: wide, broad, spacious
                    Readings: スイ、 みず、 みず-
                        Meaning: water
                    Reading: イキ
                        Meanings: range, region, limits, stage, level
                    Readings: カツ、 わ.る、 わり、 わ.り、 わ.れる、 さ.く
                        Meanings: proportion, comparatively, divide, cut, separate, split