ภายใน
inside
A native Thai recording for this word is on the way. Please check back soon.
- 1 inside、within (a place or area)
- 2 within (a period of time)、by (a deadline)
- 3 internal、interior
- 4 interior、inside
This word refers to being within a boundary. The boundary may be physical, organizational, or temporal, so it can mean “inside,” “internal,” or “within a specified time.”
inside、within (a place or area)
Indicates that something is located or happens inside the boundaries of a place, area, or container.
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ห้ามสูบบุหรี่ภายในอาคาร hâam sùup bùrìi phaay nay aakhaan Smoking is prohibited inside the building. ห้ามสูบบุหรี่ภายในอาคาร details
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มีร้านอาหารอยู่ภายในโรงแรม mii ráan aahǎan yùu phaay nay rooŋ rɛɛm There is a restaurant inside the hotel. มีร้านอาหารอยู่ภายในโรงแรม details
within (a period of time)、by (a deadline)
Sets a deadline by indicating that something must happen before a stated period or date has passed.
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งานนี้ต้องเสร็จภายในวันนี้ ŋaan níi tɔ̂ŋ sèt phaay nay wan níi This work must be finished by the end of today. งานนี้ต้องเสร็จภายในวันนี้ details
internal、interior
Describes something belonging to the inner part of an object, organization, system, or country rather than to the outside.
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ปัจจัยภายใน pàtcay phaay nay an internal factor ปัจจัยภายใน details
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อวัยวะภายใน àwayyáwá phaay nay internal organs อวัยวะภายใน details
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การประชุมภายใน kaan prachum phaay nay an internal meeting การประชุมภายใน details
interior、inside
Refers to the inner part or interior of something, as distinct from its exterior.
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ภายในบ้านสะอาดมาก phaaynay bâan saàat mâak The inside of the house is very clean. ภายในบ้านสะอาดมาก details
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ตรวจสอบภายในกล่อง trùatsɔ̀ɔp phaaynay klɔ̀ɔŋ Check the inside of the box. ตรวจสอบภายในกล่อง details
Learning notes
Explanation
The central idea of ภายใน is being on the inner side of a defined boundary. It is formed from ภาย, relating to a side or location, and ใน, meaning “in” or “inside.” The boundary can be spatial, as in ภายในอาคาร (“inside the building”); temporal, as in ภายในหนึ่งชั่วโมง (“within one hour”); or organizational and conceptual, as in ปัจจัยภายใน (“internal factor”). Compared with the general preposition ใน, ภายใน places more emphasis on the distinction between inside and outside or on staying within a set limit. It is therefore common in notices, regulations, contracts, business communication, and news, as well as in everyday language. After a noun, it can function adjectivally with the meaning “internal” or “interior.”
Usage
It is commonly used to describe the inside of buildings, hotels, containers, and other enclosed spaces; to state rules that apply within a facility; to set deadlines for replies, payments, or submissions; and to discuss matters internal to a company, school, or institution. Useful patterns include ภายใน + place, ภายใน + time period, and noun + ภายใน.
Caution
For an ordinary conversational “in” or “at,” ใน is often more natural. For example, กินข้าวในบ้าน normally means “eat in the house”; ภายในบ้าน would place extra emphasis on the interior as opposed to the outside. Also, ภายในสามวัน sets a deadline meaning “within three days.” It does not mean that something continues throughout all three days. A duration such as “for three days” can be expressed with เป็นเวลาสามวัน.
Differences from similar words
1 inside synonyms
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ข้างใน is a conversational way to say “inside” or “on the inside.” ภายใน is more suitable for defining an enclosed area in formal or administrative contexts.
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ใน is the ordinary, broadly used word for “in” or “inside.” ภายใน makes the boundary more explicit and often sounds slightly more formal or administrative, especially in notices and rules.
2 within (a period of time) synonyms
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ก่อน means “before” and may exclude the stated time or date. ภายใน means “within” or “by,” and the stated deadline is normally included.