rigid

B2 · Upper Intermediate Academic

adj. very strict and not easy to change, like a rule or a way of thinking.

adj. unwilling or unable to adapt to change; strictly adhering to a set of rules or beliefs.

“The school has rigid rules about what students can wear.”

“The manager's rigid adherence to the original schedule prevented the team from exploring more efficient alternatives during the crisis.”

C2 · Proficiency Countable noun Science Technical

n. a large aircraft, like a blimp, that has a metal frame inside to keep its shape.

n. an airship whose shape is maintained by a structural framework rather than internal gas pressure.

“Early engineers preferred the rigid because it could carry heavier loads over long distances.”

“Unlike the non-rigid blimp, the rigid featured a complex internal skeleton of duralumin girders to support its massive outer skin.”

C1 · Advanced Countable noun Sports Technical

n. a bicycle that does not have any springs or systems to absorb bumps.

n. a bicycle lacking any suspension system in the front fork or rear frame.

“He prefers riding a rigid on smooth trails because it is lighter and faster.”

“While modern mountain bikes often feature complex shocks, many purists still enjoy the direct feedback provided by a fully rigid frame.”