1. a basic, elementary, or underdeveloped way of doing something; lacking sophistication or completeness
He learned to code in a rudimentary manner without formal training.
Ele aprendeu a programar de forma rudimentar sem treinamento formal.
2. a primitive or simple method of accomplishing a task
The construction was done in a rudimentary manner with basic tools.
A construção foi feita de forma rudimentar com ferramentas básicas.