This is the 3831st most frequent Japanese word.
ろう
"ろう" can mean "wax," "old age," or "labor," depending on context.
'だろう' implies a probable outcome, often expressing a conjecture or assumption.
できるだろう。
You should be able to do it.
'だろう' is used here to express probability or certainty about a guessed statement.
あの家はおそらく古い木造建築だろう。
That house is probably an old wooden structure.
'だろう' expresses a general assumption about common knowledge.