How to say "helper" in Japanese

• 手伝いてつだいJLPT N3approx.Common
  nounThe general word for a helper: someone who lends a hand with a task such as housework, shopping, or moving house. This is the default choice when no specific role is meant.
  ４年間ねんかんは彼かれは最初さいしょの値段ねだんで芝しばを刈かってくれたが、その年としの終おわりに彼かれはしょっちゅう手伝てつだいを連つれていることに気きがついた。↗

  For four years, he cut the grass at the original price, but I noticed that toward the end of that year, he had a helper with him quite often.
• ヘルパーCommon
  nounThe loanword; in practice it most often means a care helper who assists elderly or ill people with daily life at home, rather than any casual helping hand.
• 助っ人すけっとCommon
  nounA helper called in from outside — an extra pair of hands for a big job, or a backer who bolsters a team; the help is typically temporary.
• 助手じょしゅJLPT N3approx.Common
  nounAn assistant in a defined role, working under or alongside another person, as in a laboratory. Use this when 'helper' means someone's assistant rather than a hand with a single task.
  私は助手じょしゅを探さがしている。↗

  I am looking for an assistant.
• 介添えかいぞえCommon
  noun, suru verb, intransitive verbA helper who attends to a sick person, staying at their side to see to their needs — an attendant rather than a general helping hand.

Choose 「手伝い」 for a general helping hand, 助手 for a professional assistant, 「ヘルパー」 for a care helper for the elderly or ill, 「助っ人」 for an extra person called in, and 「介添え」 for an attendant to a sick person.

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

• 手伝いてつだいhelper
• ヘルパーhelper
• 助っ人すけっとhelper
• 助手じょしゅassistant
• 介添えかいぞえhelper (e.g. for a sick person)
• お手伝いおてつだいmaid
• 助すけassistance
• 助け手たすけてhelper
• 手伝い手てつだいてhelper
• 補助員ほじょいんassistant
• 補助者ほじょしゃassistant
• 援助者えんじょしゃsupporter
• 介助者かいじょしゃaide
• てこassistant
• 助太刀すけだちhelper
• セコンドassistant
• 介錯人かいしゃくにんassistant