low class; lowly (position); humble (condition)
servant; manservant; menial
dangerous; risky; in danger; in jeopardy; uncertain; unreliable
to board; to embark on; to get into (a car); to march into; to enter
in succession; one by one
establishing; proving; ascertaining; identifying; confirming
riddle; puzzle; enigma; enigmatic; mysterious
crossing; intersection; (genetic) crossing over
time; hour; occasion; case; chance; opportunity
story; tale; narrative; account; fable; legend
to begin; to start; to happen (again); to begin (anew); to date (from); to originate (in)