Adagio

With a few exceptions, questions about musical tempos are never very satisfactory IMHO. The setter of this question was obviously aware of the potential pitfalls – hence the inclusion of the vague and subjective term "Easy" as an acceptable answer, and the instruction (to QMs) to "accept any wording equating to this."

The fact is that most of the commonest and best–known markings refer to speed, and they all basically mean either "slow", "fast", or "moderate".

Wikipedia lists 21 of them: eight that mean different degrees of slowness (and that doesn't include Andante – "at a walking pace"). Adagio is in fact one of the fastest – interpreted as 'slow with great expression'. The list continues with Larghetto ("rather slow and broad"), Lento (simply "slow"), Largo ("slow and broad") ... and so on.

As well as the eight or nine "slows", Wikipedia lists three "moderates" and eight degrees of fastness.

For the quizzer, therefore, unless the question setter insists on a very specific answer, nine out of ten times that you get asked what a particular tempo marking means, the answer is probably going to be either "slow" or "fast". It's unlikely to be "moderate" – because the Italian for moderate is moderato.

If you ask the question the other way round (e.g. "Which musical tempo marking means 'slow and with great expression'?"), I would suggest that this is going to be too technical for most people. It's also quite subjective, as there are no universally–accepted English translations of the various Italian terms.

Like I say: questions about musical tempos are rarely very satisfactory, IMHO.