Correct spelling, explanation: the correct form is triple with a single –p. Triple comes from the Latin word triplex, meaning threefold or consisting of three parts. In English, when you add a suffix like -le to a base that ends with a single consonant and is preceded by a short vowel, you typically don’t double the consonant. For example, simple and sample follow a similar pattern. Tripple is simply a misspelling.

Definition of triple:
1. Adjective, consisting of or involving three items or people
The company reported triple profits this quarter compared to the same period last year.
She ordered a triple shot of espresso to get through her busy morning.
2. Verb, become three times as much or as many
The startup aims to triple its customer base by the end of the year.
As demand for the product surged, the factory had to triple its production capacity.

Collocations with triple:
Some of the most commonly used collocations include:
1. Triple threat: refers to a person or entity excelling in three different areas or having three strong qualities or skills.
As an actor, singer, and dancer, she’s considered a triple threat in the entertainment industry.
2. Triple jump: a track and field event where the athlete makes a hop, a step, and a jump.
He set a new personal record in the triple jump at the national championships.
3. Triple bypass: a type of heart surgery where three blockages in the coronary arteries are bypassed.
After experiencing chest pain, he underwent a triple bypass surgery to improve blood flow to his heart.
4. Triple the size: refers to something becoming three times larger in size.
The company plans to triple the size of its warehouse to accommodate growing demand.

Incorrect spelling, explanation: you can’t spell triple as tripple because of English spelling rules regarding consonant doubling. In English, when a word ends with a consonant after a short vowel sound, the final consonant is typically not doubled unless it’s part of a specific word structure (like in hop → hopping). In triple, the -i is a short vowel, but the -p is not doubled because it’s followed by the ending -le, which already completes the word. Triple follows a regular spelling pattern, and tripple is a misspelling that breaks typical English word formation rules.