名詞 habituation:

1. being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs)
   同義詞：addiction, dependence, dependance, dependency
2. a general accommodation to unchanging environmental conditions

ha.bit.u.a.tion

n.（名詞）
The process of habituating or the state of being habituated.
成為習慣：養(yǎng)成習慣的過程或養(yǎng)成習慣的狀態(tài)

Physiological tolerance to a drug resulting from repeated use.
適應(yīng)性：由于長期使用某種藥物而產(chǎn)生的對該藥的生理上的耐藥性
Psychological dependence on a drug.
成癮：心理上對毒品的依賴
Psychology The decline of a conditioned response following repeated exposure to the conditioned stimulus.
【心理學】 反應(yīng)減弱：因不斷接受條件刺激而伴隨產(chǎn)生的條件反射減弱