Pronunciation: [ɡˈɛstɪmət] (IPA) 
The spelling of the word "guestimate" can be a bit confusing. "Guestimate" is a combination of two words - "guess" and "estimate". The first part of the word "guess" is pronounced as /ɡɛs/ while the second part "estimate" is pronounced as /ˈɛstəmeɪt/. When we combine the two words, we get "guestimate", which is pronounced as /ˈɡɛstəmeɪt/. Therefore, the spelling of "guestimate" follows the pronunciation of its two root words.
A "guestimate" is a colloquial term that emerges from the fusion of the words "guess" and "estimate." It refers to an approximate or rough calculation or estimation made without the use of precise or complete data. This term is primarily used when individuals need to offer an assessment or provide an educated guess on a particular subject or situation where accurate information may be lacking.
Guestimates can be derived from various factors, including personal experience, intuition, general knowledge, or a combination thereof. They are typically employed when the time or resources needed for a precise calculation or measurement are not available or deemed unnecessary. Although a guestimate may lack the accuracy or rigor of a formal estimation, it can still prove useful in giving a broad idea of a particular value or outcome.
Guestimation is frequently employed across various fields and everyday scenarios, such as in discussions involving potential costs, timeframes, quantities, or the outcome of uncertain events. It serves as a practical tool for quick decision-making or as a starting point for further analysis. It should be noted, however, that guestimates carry a higher degree of uncertainty compared to more rigorous calculations or estimates based on concrete data and methodologies.
In summary, a guestimate represents a rough approximation or educated guess made without precise information or detailed analysis, aiming to provide an indicative understanding or prediction in situations where accuracy is not paramount.
The word "guestimate" is a blend of the words "guess" and "estimate". It was coined in the mid-20th century, specifically around the 1930s, by combining these two terms. The combination of these words emphasizes that a "guestimate" is an educated guess or approximation rather than a precise calculation or measurement.
