灯: electric lights / 投: pitches / 棟: buildings / 等: / 頭: heads of large animals (cows, horses)

The white-blooming variety of the sweet olive or fragrant olive (Osmanthus fragrans)

unreliable, doubtful, uncertain / questionable, dubious, suspicious / indecent, licentious, obscene / disreputable, dishonest, shady

well, so, well then (used at the start of a sentence as an interjection or conjunction, leading in from the previous statement)