Foreign lands.
The outside part, parts or surface of something.
Being from outside a country; foreign.
Outdoor.
Relating to the outside parts or surface of something.
Related to a foundation. base, or basis; serving as a foundation.
essential; extremely important
The lowest frequency of a periodic waveform.
A main or major principle, rule, law, etc. which serves as the foundation or basis of a system; an essential part
The lowest partial of a complex tone.