useful
adj.helping you to do or get what you want. You use this to describe things that are good for a specific job or purpose.
adj.providing a practical benefit or serving a functional purpose. Frequently used to describe tools, information, or advice that facilitates the achievement of a goal.
“This map is very useful for our trip.”
“The teacher gave us some useful tips on how to prepare for the final exam.”
“While the initial data seemed chaotic, the researcher found several useful patterns that eventually formed the basis of her groundbreaking theory on urban migration.”
Commonly followed by the preposition 'for' when indicating a purpose or 'to' when followed by an infinitive.
Learners sometimes confuse the adjective 'useful' with the adverb 'usefully' when following a linking verb like 'be'.
Usage useful life · useful question · useful tool
From use + -ful.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.