ハードhaado

1. na-adjective, no-adjectivehard; tough
   ウーッ、今日きょうの練習れんしゅうはいつになくハードで辛つらい。↗

   Whoo! Today's practice is tough - much harder than usual.
2. noun, computinghardware
   Xbox 360については「いいハードです」と開口かいこう一番いちばん切り出きりだした。↗

   On the Xbox 360 the very first thing he said was "good hardware."
3. noun, computinghard disk (drive)
   ハードが断片化だんぺんかを起おこしてるみたい。↗

   It looks like your hard disk is fragmented.

• Synonym硬いかたいNeutralDescribes physically hard objects, or stiff expressions and writing, as in 「硬いパン」. 「ハード」 also covers hardness but usually stresses intensity, hardship, or hardware.
• Synonym丈夫じょうぶNeutralCovers robust health or durable items, as in 「丈夫な体」. 「ハード」 is about demanding, intense things and never about health.
• SynonymタフCasualColloquial. Describes resilient people who can take punishment, as in 「タフな人」, or a tricky situation; 「ハード」 mostly describes the hardship of the thing itself.
• Synonym硬質こうしつWrittenTechnical term for hard materials, mostly used attributively, as in 「硬質ガラス」. 「ハード」 goes beyond hardness to hardship and hardware.
• SynonymきついCasualCommon colloquial word for exhausting, harsh demands, tight clothes, or forceful personalities, as in 「仕事がきつい」. In the hardship sense it swaps with 「ハード」.
• SynonymヘビーCasualLoanword for heavy weight, heavy burdens, or heavy subject matter, as in 「ヘビーな話」. 「ハード」 stresses intensity and hardship.
• Related頑丈がんじょうNeutralDescribes sturdily built things or bodies, as in 「頑丈な箱」. 「ハード」 does not stress durability; it leans toward intensity and hardship.
• Related丈夫じょうぶNeutralCovers robust health or durable items, as in 「丈夫な体」. 「ハード」 is about demanding, intense things and never about health.
• Related強靭きょうじんWrittenWritten word for toughness with flexibility, as in 「強靭な精神」 or 「強靭な肉体」. 「ハード」 has no nuance of suppleness; it stresses hardship.
• Related困難こんなんNeutralRefers to things hard to achieve or resolve; common in writing and news, as in 「困難な状況」. 「ハード」 leans toward physical strain and heavy workload.
• Related難しいむずかしいNeutralThe broadest word for things hard to understand or handle, as in 「難しい問題」. 「ハード」 can also mean high difficulty but leans toward heavy load and intensity.
• RelatedつらいNeutralCovers emotional or physical suffering and hard jobs or situations, as in 「辛い仕事」. It centers on the person's pain; 「ハード」 centers on intensity.
• Related強力きょうりょくNeutralDescribes powerful force or effect, as in 「強力な薬」, stressing potency. 「ハード」 can say 「ハードなパンチ」 but usually means heavy load and hardship.
• Related強烈きょうれつNeutralDescribes intense stimuli or effects, as in 「強烈な印象」 or 「強烈な日差し」. 「ハード」 stresses the intensity of work or training.
• Related力強いちからづよいNeutralPositive word for forceful, reassuring strength, as in 「力強い声」. 「ハード」 describes heavy burdens and carries no praise.
• Related苦しいくるしいNeutralCovers labored breathing, mental or physical suffering, and financial strain, as in 「生活が苦しい」. 「ハード」 stresses intense schedules or training.
• Related頑強がんきょうWrittenWritten word for stubborn, unyielding persistence or a sturdy body, as in 「頑強な抵抗」. 「ハード」 describes tough circumstances, not tenacity of will.
• Related強壮きょうそうWrittenWritten word for a strong, healthy physique, seen in 「強壮剤」 and 「滋養強壮」. 「ハード」 is never used about physical constitution.
• RelatedしんどいCasualColloquial, from western Japanese dialects, for feeling worn out or drained, as in 「この仕事しんどい」. It centers on one's own fatigue; 「ハード」 on intensity.
• Related手ごわいてごわいNeutralDescribes opponents or problems that are hard to handle, as in 「手ごわい相手」. 「ハード」 says the task itself is draining, not that an opponent is formidable.
• Related重たいおもたいNeutralMeans physically heavy, also gloomy moods or atmospheres, as in 「重たい空気」. 「ハード」 stresses the intensity of work or training.
• Related堅牢けんろうWrittenWritten word for solidly built, durable buildings and objects, as in 「堅牢な建物」. 「ハード」 stresses intensity and hardship, not structural sturdiness.
• Related手強いてづよいNeutralRead 「てづよい」. Describes firm, unyielding attitudes, mostly how people handle things; 「ハード」 stresses the intensity and hardship of the task.
• RelatedごついCasualColloquial for big, rough, rugged looks, mainly hands and physiques, as in 「ごつい手」. For looks 「ハード」 suggests a hard-edged style, not bulk.
• Related剛ごうWrittenWritten word for strength and boldness, mostly in set phrases like 「剛の者」 or 「剛速球」. 「ハード」 is an everyday loanword stressing hardship.
• AntonymソフトNeutralAntonym in hardness vs. softness, toughness vs. gentleness, and hardware vs. software; it does not mean easy.
• AntonymイージーNeutralAntonym on the easy-hard axis: it means easy and effortless, and can also imply carelessness, as in 「イージーミス」.

Use 「ハード」 for high intensity or hardship, as in 「ハードな練習」, and for hardware. For tiring work say 「きつい」 or 「しんどい」; for physically hard things 「硬い」; for sturdy, durable things 「頑丈」. The antonyms are 「ソフト」 and 「イージー」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 硬かたい。
2. むずかしい。きびしい。大変たいへんだ。