signal

英['s?gn(?)l] 美['s?gnl]

反義詞

復數:?signals;第三人稱單數:?signals;過去式:?signalled;過去分詞:?signalled;現在分詞:?signalling;副詞:?signally;

1、sign- + -al.
2、動態的符號，就是信號、暗號。

signal 信號，暗號，標記，表明

sign,標記，記號，-al,名詞后綴。引申詞義信號，暗號等。

signal: signal: [16] Latin signālis meant ‘of a sign’ (it was derived from signum ‘mark, token’, source of English sign). It came to be used as a noun, and passed via medieval Latin signāle into Old French as seignal. This was later relatinized into signal, in which form it was taken over by English. The adjective signal ‘conspicuous’ came from the same ultimate source, but via a more circuitous route. The Italian version of the noun signal is segnale. From it was derived the verb segnalare ‘make famous’, whose past participle segnalato gave French signalé – whence English signal.
=> sign
signal (n.): late 14c., "visible sign, indication," from Old French signal, seignal "seal, imprint, sign, mark," from Medieval Latin signale "a signal," from Late Latin signalis (adj.) "used as a signal, pertaining to a sign," from Latin signum "signal, sign" (see sign (n.)). Restricted sense "agreed-upon sign (to commence or desist, etc.) is from 1590s. Meaning "modulation of an electric current" is from 1855.
signal (v.): 1805, "to make signals to," from signal (n.). Related: Signaled; signaling. Earlier verb was signalize (1650s).
signal (adj.): "remarkable, striking, notable" ("serving as a sign"), 1640s, from French signalé, past participle of signaler "to distinguish, signal" (see signal (n.)).

3. The transmitters will send a signal automatically to a local base station.: 發射臺會自動將信號發射到地方基站。

5. Kurdish leaders saw the visit as an important signal of support.: 庫爾德領導人將這次訪問視作一種表示支持的重要信號。