1.predation n．捕食（行为、习性等）；掠夺行为(depredation)

例：In the snow goose's winter habitats, the goose faces no significan.t natural predation.

2.predator n.食肉动物(animal that kills and eats other animals)

例：The seal tried to avoid predators by a deep dive.

派生词：predatory(a．食肉的；掠夺的)

3.predatory a.掠夺的(of, relating to, or practicing plunder, pillage, or rapine);食肉的(predaceous)

词根记忆：来自predator(n.掠夺者，捕食者)

例：The bones of Majungatholus atopus,a meat-eating dinosaur that is a distant relative of Tyrannosaurus rex and closely resembles South American predatory dinosaurs, have been discovered in Madagascar.

同根词：predation(n．捕食；掠夺)

4.predecessor n.前任者(a person who has previously occupied a position or office to which another has succeeded)；（被取代的）人或事物(precursor)

词根记忆：pre(先)+de+cess(走)+or--走在前面的人--前任者

例：They are probably more concerned than their predecessors were about job security and economic benefits.

5.predicament n.困境，窘境(plight)

例：I was in the predicament of competing against the best runner.

6.predicate v.使基于(found, base)；断言，肯定（affirm）：暗示(imply)

词根记忆：pre(预先)+dic(命令)+ate--断言

例：These arguments are predicated on differences between the sexes.// He predicated the motive to be good.// His retraction predicates a change of attitude.