lagged

v. quedar atrás, quedar rezagado, quedarse atrás, rezagarse; ser rezagado; encarcelarse (slang)

retrasado

v.- retrasar | rezagar | demorar | tardar | desfasar | flaquears.- retraso | rezago | demora | tardanza | desfase

(slang) borracho, intoxicado

Ex: The study found that although library media specialists supported the instructional consultant role they lagged in practising it.
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*lag + behind = rezagarse, ir por detrás de, ir detrás de, ir con retraso con respecto a

(v.) = demorarse, rezagarse, ir por detrás
Ex: The study found that although library media specialists supported the instructional consultant role they lagged in practising it.
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* lag + behind = rezagarse, ir por detrás de, ir detrás de, ir con retraso con respecto a, ir a la zaga