abbreviation, omission, outline, shorten, capture, plunder
略 centers on reducing something to its essential form: abbreviating, omitting details, or giving an outline. The meanings of capturing and plundering extend from the idea of taking only the most valuable part, leaving the rest behind.
略 combines 田 (field) and 各 (each). The original sense likely involved dividing or parcelling out land, which led to the idea of outlining boundaries and, by extension, abbreviating or omitting details. The 'plunder' meaning may derive from the idea of taking a portion of land by force.
Picture a field (田) where each (各) section is marked with a simple outline instead of a detailed map. By omitting the details, you abbreviate the plan and capture only the essential shape.
For リャク, imagine a quick 'ryak' sound as you swiftly draw an abbreviated outline of a field: ryak -> リャク, capturing just the essentials.
strategy; tactics
capture (of enemy territory); taking (by storm); conquest; attack; assault
abbreviation; omission
invasion (e.g. of a country); raid; aggression
omission; leaving out
to abbreviate; to abridge; to shorten
pillage; plunder; looting; robbery
omission (of middle part of a text); ellipsis
abbreviation
stratagem; artifice; trick; ruse; scheme; tactics
simple; brief
outline; summary; gist; in brief
scheme; plot; artifice; stratagem; trick
abbreviation; acronym
plan; scheme; stratagem; trick; trap; plot
informal; simplified
dispensing with the preliminaries ...
politics; political manoeuvre; political maneuver
brief personal record; short curriculum vitae; short CV
(great mental) resources; quick brain; resourcefulness; good wits