dur  -  cu putere

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dur  -  aspru

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dur  -  dificil

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dur  -  greu

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dur  -  tare

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durillon  -  batatura

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durete  -  asprime

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durete  -  duritate

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durer  -  a rezista

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durer  -  a dura

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durement  -  cu duritate

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durement  -  cu asprime

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duree  -  durata

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durcissement  -  inasprire

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durcissement  -  intarire

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durcir  -  a se inaspri

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durcir  -  a inaspri

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durcir  -  a intari

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durcir  -  a se intari

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durant  -  in timpul

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durant  -  timp de

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durable  -  durabil

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