皆さん
皆さん means “everyone” in the greeting Good morning, everyone. It addresses a group of people together and is placed before or after a greeting when speaking to the whole group. Use it when addressing several people rather than one person.
おはようございます
おはようございます is the polite Japanese greeting used for “Good morning.” In this expression, おはよう is the morning greeting and ございます makes the greeting polite. Use it when greeting people in the morning, especially in a polite or group setting.
お元気
お元気 refers to someone being well or healthy in the polite question お元気ですか. The お gives the expression a polite form, while 元気 expresses well-being. Use お元気 when politely asking about another person’s condition.
です
です gives the statement 元気です a polite sentence ending, so the full line means “I am fine.” Here it politely states the condition expressed by 元気. It can follow a word or phrase to make a polite statement.
か
か marks the sentence お元気ですか as a question, giving it the meaning “How are you?” In this dialogue, it appears at the end of the question. Use か at the end of a sentence when forming a polite question.
元気
元気 means “fine” or “well” in the statement 元気です. It describes the speaker’s good condition in the reply “I am fine.” Use 元気 when talking about someone’s well-being or condition.
はじめまして
はじめまして is the conventional polite greeting meaning “Nice to meet you” when meeting someone for the first time. Within はじめまして, はじめ points to a beginning or first encounter, and まして completes the fixed polite expression. Use it at the start of an introduction to a new person.
良い
良い means “good” or “nice” and describes 一日 in 良い一日をお過ごしください. It appears before the noun it describes. Use 良い before a noun when expressing that something is good or desirable.
一日
一日 means “day” in 良い一日をお過ごしください. Together with 良い, it refers to the day being wished for. Use 一日 when referring to one day or the day as a period of time.
を
を is the Japanese particle placed after 一日 to mark it as the thing connected to お過ごしください. In the full expression, the meaning is “Please have a nice day,” rather than を meaning “day” by itself. Use を after the object of an action or request.
お過ごしください
お過ごしください means “please spend” or “please have” and functions as a polite well-wish in 良い一日をお過ごしください. お過ごし is the polite form used for spending time, and ください makes it a polite request. Use it after a time expression when wishing someone a pleasant period, as in 良い一日をお過ごしください.
どういたしまして
どういたしまして is the fixed polite response meaning “You are welcome.” In どういたしまして, どう introduces the expression’s “how” wording, いたし carries the polite “do” element, and まして completes the conventional response. Use it after someone thanks you.